fixed some other comments, now also the code side seems to be at a level to be reviewed by experienced programmers

main.c

@@ -214,7 +214,7 @@ quit(Arg *arg)
 /*
  * There's no way to check accesses to destroyed windows, thus those cases are
  * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
- * default error handler, which calls exit().
+ * default error handler, which may call exit.
  */
 int
 xerror(Display *dpy, XErrorEvent *ee)
@@ -229,7 +229,7 @@ xerror(Display *dpy, XErrorEvent *ee)
 		return 0;
 	fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
 		ee->request_code, ee->error_code);
-	return xerrorxlib(dpy, ee); /* may call exit() */
+	return xerrorxlib(dpy, ee); /* may call exit */
 }
 
 int