for (it = stacking_list; it != NULL; it = it->next) {
if (WINDOW_IS_CLIENT(it->data)) {
ObClient *c = WINDOW_AS_CLIENT(it->data);
for (it = stacking_list; it != NULL; it = it->next) {
if (WINDOW_IS_CLIENT(it->data)) {
ObClient *c = WINDOW_AS_CLIENT(it->data);