- Fixed memory leak with this pointer. It was somtimes initialized with refcount

of 2 instead of 1.
- Also fixed a place where object.ptr_ptr is set to pointing to a zval* instead
  of zval**. I don't think this is ever used so we might be able to remove it
  altogether.

Zend/zend_execute.c

@@ -1492,9 +1492,9 @@ do_fcall_common:
                                 	*tmp = *object.ptr;
                                 	zendi_zval_copy_ctor(*tmp);
 									object.ptr = tmp;
-									*object.ptr_ptr = tmp;
+									object.ptr_ptr = &tmp;
                         		}
-                        		object.ptr->refcount = 1;
+                        		object.ptr->refcount = 0;
                         		object.ptr->is_ref = 1;
                 			}
 							*this_ptr = object.ptr;