Fix fake closure leaking when called from internal func

Introduced in 8e49d7f32f.

ZEND_CALL_RELEASE_THIS was previously not handled for internal calls but
just for user calls in the zend_leave_helper.

Closes GH-9884

Zend/zend_execute_API.c

@@ -973,6 +973,10 @@ cleanup_args:
 				zend_interrupt_function(EG(current_execute_data));
 			}
 		}
+
+		if (UNEXPECTED(ZEND_CALL_INFO(call) & ZEND_CALL_RELEASE_THIS)) {
+			OBJ_RELEASE(Z_OBJ(call->This));
+		}
 	}
 	EG(fake_scope) = orig_fake_scope;