[2.0.0] Fix broken ACL inheritance

Problem:
If you inherit the acl memory adapter and call inside your class $this->allow(...) then following exception will thrown.

*ErrorException: Invalid callback PhalconTest\Acl\Adapter\Memory::_allowordeny, cannot access private method PhalconTest\Acl\Adapter\Memory::_allowOrDeny()*


This pull request is a quick fix. I think the real issue appears in compilation from zephir to c.