Prevent glib-critical - followup of (#912)

thunar/thunar-location-entry.c

@@ -456,7 +456,7 @@ thunar_location_entry_emit_edit_done (ThunarLocationEntry *entry)
    * - do not emit the signal if the context menu was opened
    * - only emit the signal if we are the toplevel window (no reset on a window backdrop)
    */
-  if (entry->right_click_occurred == FALSE && gtk_window_has_toplevel_focus (GTK_WINDOW (window)) == TRUE)
+  if (entry->right_click_occurred == FALSE && GTK_IS_WINDOW (window) && gtk_window_has_toplevel_focus (GTK_WINDOW (window)) == TRUE)
     {
       g_signal_handlers_disconnect_by_func (entry->path_entry, G_CALLBACK (thunar_location_entry_emit_edit_done), entry);
       g_signal_emit_by_name (entry, "edit-done");