rootston: unmap view after emitting destroy signal in view_destroy

rootston/desktop.c

@@ -417,12 +417,12 @@ void view_destroy(struct roots_view *view) {
 		return;
 	}
 
+	wl_signal_emit(&view->events.destroy, view);
+
 	if (view->wlr_surface != NULL) {
 		view_unmap(view);
 	}
 
-	wl_signal_emit(&view->events.destroy, view);
-
 	if (view->destroy) {
 		view->destroy(view);
 	}