hotkeys: fix wall-paper toggling

modules/control/hotkeys.c

@@ -369,10 +369,10 @@ static int PutAction( intf_thread_t *p_intf, int i_action )
 
         /* Playlist + video output actions */
         case ACTIONID_WALLPAPER:
-        {   /* FIXME: this is invalid if not using DirectX output!!! */
-            vlc_object_t *obj = p_vout ? VLC_OBJECT(p_vout)
-                                       : VLC_OBJECT(p_playlist);
-            var_ToggleBool( obj, "video-wallpaper" );
+        {
+            bool wp = var_ToggleBool( p_playlist, "video-wallpaper" );
+            if( p_vout )
+                var_SetBool( p_vout, "video-wallpaper", wp );
             break;
         }