Compilation issue with php53 on RHEL5

Compiling on Red Hat Enterprise Linux 5 fails with the following error:
```zend/objectimpl.h:88:95: error: ‘zval_property_ctor’ was not declared in this scope
         zend_hash_copy(_mixed->php.properties, &entry->default_properties, (copy_ctor_func_t) zval_property_ctor, &tmp, sizeof(zval*));```