Use ZEND_THIS instead of getThis()
Use ZEND_THIS instead of getThis()

getThis() calls ZEND_THIS and returns NULL if it is not an object.
We know that it is an object and if a NULL was returned, we'd be
dereferencing NULL.

maxmind/MaxMind-DB-Reader-php,maxmind/MaxMind-DB-Reader-php,maxmind/MaxMind-DB-Reader-php