cleanup, dont use c++ style comments

- signal: print error string.
- die: start message with lower-case (consistency).
- bump version to 2015.

dwm.c

@@ -557,7 +557,7 @@ configurenotify(XEvent *e) {
 	XConfigureEvent *ev = &e->xconfigure;
 	Bool dirty;
 
-	// TODO: updategeom handling sucks, needs to be simplified
+	/* TODO: updategeom handling sucks, needs to be simplified */
 	if(ev->window == root) {
 		dirty = (sw != ev->width || sh != ev->height);
 		sw = ev->width;
@@ -1509,7 +1509,7 @@ setup(void) {
 	drw = drw_create(dpy, screen, root, sw, sh);
 	drw_load_fonts(drw, fonts, LENGTH(fonts));
 	if (!drw->fontcount)
-		die("No fonts could be loaded.\n");
+		die("no fonts could be loaded.\n");
 	bh = drw->fonts[0]->h + 2;
 	updategeom();
 	/* init atoms */
@@ -1572,7 +1572,7 @@ showhide(Client *c) {
 void
 sigchld(int unused) {
 	if(signal(SIGCHLD, sigchld) == SIG_ERR)
-		die("Can't install SIGCHLD handler");
+		die("can't install SIGCHLD handler:");
 	while(0 < waitpid(-1, NULL, WNOHANG));
 }
 
@@ -2054,7 +2054,7 @@ zoom(const Arg *arg) {
 int
 main(int argc, char *argv[]) {
 	if(argc == 2 && !strcmp("-v", argv[1]))
-		die("dwm-"VERSION", © 2006-2014 dwm engineers, see LICENSE for details\n");
+		die("dwm-"VERSION", © 2006-2015 dwm engineers, see LICENSE for details\n");
 	else if(argc != 1)
 		die("usage: dwm [-v]\n");
 	if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())