fix malloc error: monitor clients is now initialized to NULL

handler.c

@@ -139,7 +139,6 @@ void wm_keypress_handler(Wm *wm, XKeyPressedEvent e)
 
     for (int i = 0; i < wm->cfg_kb_count; i++) {
         k = wm->cfg_keybinds[i];
-        DEBUG_PRINT("Keybind keysym: %s\n", XKeysymToString(k.keysym));
         if (k.mask == e.state && k.keysym == XLookupKeysym(&e, 0))
         {
             (*k.func)(wm, &k.args);
@@ -151,6 +150,9 @@ void wm_maprequest_handler(Wm *wm, XMapRequestEvent e)
 {
     DEBUG_PRINT("MapRequest event\n")
 
+    if (e.window == wm->root.window)
+        fprintf(stderr, "%s e.window was root\n", __func__);
+
     Client *c;
 
     c = wm_client_find(wm, e.window);