if (! using_xdamage || ! xdamage_present) {
if (! use_xdamage || ! xdamage_present) {
void check_xdamage_state(void) {	if (! using_xdamage || ! xdamage_present) {		return;	}	/*	 * Create or destroy the Damage object as needed, we don't want	 * one if no clients are connected.	 */	if (client_count) {		create_xdamage();	} else {		destroy_xdamage();	}}