Update phalcon_class_exists() to match PHP 5.4 behavior
Update phalcon_class_exists() to match PHP 5.4 behavior

unisys12/phalcon-hhvm,Zaszczyk/cphalcon,unisys12/phalcon-hhvm,Zaszczyk/cphalcon,Zaszczyk/cphalcon,unisys12/phalcon-hhvm,unisys12/phalcon-hhvm,unisys12/phalcon-hhvm,Zaszczyk/cphalcon,unisys12/phalcon-hhvm