message: init property point.
diff: @@ -1065,6 +1065,10 @@ static PHP_METHOD(swoole_client, __construct)
  }
  //init
  swoole_set_object(getThis(), NULL);
  + swoole_set_property(getThis(), client_property_callback, NULL);
  +#ifdef SWOOLE_SOCKETS_SUPPORT
  + swoole_set_property(getThis(), client_property_socket, NULL);
  +#endif
  RETURN_TRUE;
  }
  