code changes from joe, using CADisplayLink
code changes from joe, using CADisplayLink

masd-duc/URBNAlert,mark2b/URBNAlert,urbn/URBNAlert,denivip/URBNAlert,masd-duc/URBNAlert,denivip/URBNAlert,denivip/URBNAlert,masd-duc/URBNAlert,urbn/URBNAlert