fix: error changse surface scene in minimized client

will cause crash if close all client in overview, when has minimized
client before toggle overview

src/mango.c

@@ -1234,7 +1234,7 @@ void swallow(Client *c, Client *w) {
 		w->overview_scene_surface = NULL;
 	}
 
-	if (c->mon && c->mon->isoverview) {
+	if (c->mon && c->mon->isoverview && config.ov_no_resize) {
 		overview_backup_surface(c);
 	}