Handle WM_DELETE_WINDOW messages correctly, thanks to fungt

main.c

@@ -475,6 +475,10 @@ void run() {
 						timeout = 1;
 					}
 					break;
+				case ClientMessage:
+					if ((Atom) ev.xclient.data.l[0] == wm_delete_win)
+						return;
+					break;
 			}
 		}
 	}

window.c

@@ -28,9 +28,10 @@
 
 static Cursor arrow;
 static Cursor hand;
-
 static GC bgc;
 
+Atom wm_delete_win;
+
 void win_set_sizehints(win_t *win) {
 	XSizeHints sizehints;
 
@@ -122,6 +123,9 @@ void win_open(win_t *win) {
 
 	XMapWindow(e->dpy, win->xwin);
 	XFlush(e->dpy);
+
+	wm_delete_win = XInternAtom(e->dpy, "WM_DELETE_WINDOW", False);
+	XSetWMProtocols(e->dpy, win->xwin, &wm_delete_win, 1);
 	
 	if (options->fullscreen)
 		win_toggle_fullscreen(win);

window.h

@@ -53,6 +53,8 @@ typedef struct win_s {
 	unsigned char fullscreen;
 } win_t;
 
+extern Atom wm_delete_win;
+
 void win_open(win_t*);
 void win_close(win_t*);