gpointer
gtk_object_get_user_data (GtkObject *object)
{
  if (user_data_key_id)
-    gtk_object_get_data_by_id (object, user_data_key_id);
+    return gtk_object_get_data_by_id (object, user_data_key_id);

  return NULL;
}

boy oh boy, that was a *neat* one ;)
-timj