|  | @@ -94,8 +94,8 @@ typedef struct {
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				|  |  |  typedef struct {
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				|  |  |  	unsigned long mod;
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				|  |  |  	KeySym keysym;
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				|  |  | -	void (*func)(void *arg);
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				|  |  | -	void *arg;
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				|  |  | +	void (*func)(const void *arg);
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				|  |  | +	const void *arg;
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				|  |  |  } Key;
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				|  |  |  
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				|  |  |  typedef struct {
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				|  | @@ -136,8 +136,8 @@ void eprint(const char *errstr, ...);
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				|  |  |  void expose(XEvent *e);
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				|  |  |  void focus(Client *c);
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				|  |  |  void focusin(XEvent *e);
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				|  |  | -void focusnext(void *arg);
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				|  |  | -void focusprev(void *arg);
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				|  |  | +void focusnext(const void *arg);
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				|  |  | +void focusprev(const void *arg);
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				|  |  |  Client *getclient(Window w);
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				|  |  |  unsigned long getcolor(const char *colstr);
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				|  |  |  long getstate(Window w);
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				|  | @@ -150,33 +150,33 @@ Bool isprotodel(Client *c);
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				|  |  |  Bool isurgent(unsigned int t);
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				|  |  |  Bool isvisible(Client *c);
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				|  |  |  void keypress(XEvent *e);
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				|  |  | -void killclient(void *arg);
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				|  |  | +void killclient(const void *arg);
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				|  |  |  void manage(Window w, XWindowAttributes *wa);
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				|  |  |  void mappingnotify(XEvent *e);
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				|  |  |  void maprequest(XEvent *e);
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				|  |  |  void movemouse(Client *c);
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				|  |  |  Client *nextunfloating(Client *c);
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				|  |  |  void propertynotify(XEvent *e);
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				|  |  | -void quit(void *arg);
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				|  |  | +void quit(const void *arg);
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				|  |  |  void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
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				|  |  |  void resizemouse(Client *c);
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				|  |  |  void restack(void);
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				|  |  |  void run(void);
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				|  |  |  void scan(void);
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				|  |  |  void setclientstate(Client *c, long state);
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				|  |  | -void setmfact(void *arg);
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				|  |  | +void setmfact(const void *arg);
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				|  |  |  void setup(void);
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				|  |  | -void spawn(void *arg);
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				|  |  | -void tag(void *arg);
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				|  |  | +void spawn(const void *arg);
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				|  |  | +void tag(const void *arg);
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				|  |  |  unsigned int textnw(const char *text, unsigned int len);
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				|  |  |  unsigned int textw(const char *text);
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				|  |  |  void tile(void);
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				|  |  |  void tileresize(Client *c, int x, int y, int w, int h);
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				|  |  | -void togglebar(void *arg);
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				|  |  | -void togglefloating(void *arg);
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				|  |  | -void togglelayout(void *arg);
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				|  |  | -void toggletag(void *arg);
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				|  |  | -void toggleview(void *arg);
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				|  |  | +void togglebar(const void *arg);
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				|  |  | +void togglefloating(const void *arg);
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				|  |  | +void togglelayout(const void *arg);
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				|  |  | +void toggletag(const void *arg);
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				|  |  | +void toggleview(const void *arg);
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				|  |  |  void unban(Client *c);
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				|  |  |  void unmanage(Client *c);
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				|  |  |  void unmapnotify(XEvent *e);
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				|  | @@ -186,12 +186,12 @@ void updatesizehints(Client *c);
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				|  |  |  void updatetilegeom(void);
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				|  |  |  void updatetitle(Client *c);
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				|  |  |  void updatewmhints(Client *c);
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				|  |  | -void view(void *arg);
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				|  |  | -void viewprevtag(void *arg);
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				|  |  | +void view(const void *arg);
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				|  |  | +void viewprevtag(const void *arg);
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				|  |  |  int xerror(Display *dpy, XErrorEvent *ee);
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				|  |  |  int xerrordummy(Display *dpy, XErrorEvent *ee);
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				|  |  |  int xerrorstart(Display *dpy, XErrorEvent *ee);
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				|  |  | -void zoom(void *arg);
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				|  |  | +void zoom(const void *arg);
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				|  |  |  
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				|  |  |  /* variables */
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				|  |  |  char stext[256];
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				|  | @@ -667,7 +667,7 @@ focusin(XEvent *e) { /* there are some broken focus acquiring clients */
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				|  |  |  }
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				|  |  |  
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				|  |  |  void
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				|  |  | -focusnext(void *arg) {
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				|  |  | +focusnext(const void *arg) {
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				|  |  |  	Client *c;
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				|  |  |  
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				|  |  |  	if(!sel)
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				|  | @@ -682,7 +682,7 @@ focusnext(void *arg) {
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				|  |  |  }
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				|  |  |  
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				|  |  |  void
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				|  |  | -focusprev(void *arg) {
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				|  |  | +focusprev(const void *arg) {
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				|  |  |  	Client *c;
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				|  |  |  
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				|  |  |  	if(!sel)
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				|  | @@ -905,7 +905,7 @@ keypress(XEvent *e) {
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				|  |  |  }
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				|  |  |  
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				|  |  |  void
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				|  |  | -killclient(void *arg) {
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				|  |  | +killclient(const void *arg) {
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				|  |  |  	XEvent ev;
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				|  |  |  
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				|  |  |  	if(!sel)
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				|  | @@ -1088,7 +1088,7 @@ propertynotify(XEvent *e) {
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				|  |  |  }
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				|  |  |  
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				|  |  |  void
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				|  |  | -quit(void *arg) {
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				|  |  | +quit(const void *arg) {
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				|  |  |  	readin = running = False;
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				|  |  |  }
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				|  |  |  
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				|  | @@ -1321,7 +1321,7 @@ setclientstate(Client *c, long state) {
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				|  |  |  
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				|  |  |  /* arg > 1.0 will set mfact absolutly */
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				|  |  |  void
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				|  |  | -setmfact(void *arg) {
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				|  |  | +setmfact(const void *arg) {
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				|  |  |  	double d = *((double*) arg);
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				|  |  |  
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				|  |  |  	if(!d || lt->arrange != tile)
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				|  | @@ -1412,7 +1412,7 @@ setup(void) {
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				|  |  |  }
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				|  |  |  
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				|  |  |  void
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				|  |  | -spawn(void *arg) {
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				|  |  | +spawn(const void *arg) {
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				|  |  |  	static char *shell = NULL;
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				|  |  |  
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				|  |  |  	if(!shell && !(shell = getenv("SHELL")))
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				|  | @@ -1434,7 +1434,7 @@ spawn(void *arg) {
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				|  |  |  }
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				|  |  |  
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				|  |  |  void
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				|  |  | -tag(void *arg) {
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				|  |  | +tag(const void *arg) {
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				|  |  |  	if(sel && *(int *)arg & TAGMASK) {
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				|  |  |  		sel->tags = *(int *)arg & TAGMASK;
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				|  |  |  		arrange();
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				|  | @@ -1505,7 +1505,7 @@ tileresize(Client *c, int x, int y, int w, int h) {
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				|  |  |  }
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				|  |  |  
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				|  |  |  void
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				|  |  | -togglebar(void *arg) {
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				|  |  | +togglebar(const void *arg) {
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				|  |  |  	showbar = !showbar;
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				|  |  |  	updategeom();
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				|  |  |  	updatebar();
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				|  | @@ -1513,7 +1513,7 @@ togglebar(void *arg) {
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				|  |  |  }
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				|  |  |  
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				|  |  |  void
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				|  |  | -togglefloating(void *arg) {
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				|  |  | +togglefloating(const void *arg) {
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				|  |  |  	if(!sel)
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				|  |  |  		return;
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				|  |  |  	sel->isfloating = !sel->isfloating;
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				|  | @@ -1523,7 +1523,7 @@ togglefloating(void *arg) {
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				|  |  |  }
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				|  |  |  
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				|  |  |  void
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				|  |  | -togglelayout(void *arg) {
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				|  |  | +togglelayout(const void *arg) {
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				|  |  |  	unsigned int i;
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				|  |  |  
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				|  |  |  	if(!arg) {
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				|  | @@ -1545,7 +1545,7 @@ togglelayout(void *arg) {
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				|  |  |  }
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				|  |  |  
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				|  |  |  void
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				|  |  | -toggletag(void *arg) {
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				|  |  | +toggletag(const void *arg) {
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				|  |  |  	int i, m = *(int *)arg;
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				|  |  |  	for(i = 0; i < sizeof(int) * 8; i++)
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				|  |  |  		fputc(m & 1 << i ? '1' : '0', stdout);
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				|  | @@ -1561,7 +1561,7 @@ toggletag(void *arg) {
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				|  |  |  }
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				|  |  |  
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				|  |  |  void
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				|  |  | -toggleview(void *arg) {
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				|  |  | +toggleview(const void *arg) {
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				|  |  |  	if((tagset[seltags] ^ ((*(int *)arg) & TAGMASK))) {
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				|  |  |  		tagset[seltags] ^= (*(int *)arg) & TAGMASK;
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				|  |  |  		arrange();
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				|  | @@ -1737,7 +1737,7 @@ updatewmhints(Client *c) {
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				|  |  |  }
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				|  |  |  
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				|  |  |  void
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				|  |  | -view(void *arg) {
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				|  |  | +view(const void *arg) {
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				|  |  |  	if(*(int *)arg & TAGMASK) {
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				|  |  |  		seltags ^= 1; /* toggle sel tagset */
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				|  |  |  		tagset[seltags] = *(int *)arg & TAGMASK;
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				|  | @@ -1746,7 +1746,7 @@ view(void *arg) {
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				|  |  |  }
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				|  |  |  
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				|  |  |  void
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				|  |  | -viewprevtag(void *arg) {
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				|  |  | +viewprevtag(const void *arg) {
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				|  |  |  	seltags ^= 1; /* toggle sel tagset */
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				|  |  |  	arrange();
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				|  |  |  }
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				|  | @@ -1785,7 +1785,7 @@ xerrorstart(Display *dpy, XErrorEvent *ee) {
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				|  |  |  }
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				|  |  |  
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				|  |  |  void
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				|  |  | -zoom(void *arg) {
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				|  |  | +zoom(const void *arg) {
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				|  |  |  	Client *c = sel;
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				|  |  |  
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				|  |  |  	if(c == nextunfloating(clients))
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