message: Improve code of getSocket.
diff: @@ -606,9 +606,8 @@ static PHP_METHOD(swoole_socket_coro, getSocket)
  RETURN_FALSE;
  }
  SW_ZEND_REGISTER_RESOURCE(return_value, (void * ) socket_object, php_sockets_le_socket());
  - zval *zsocket = sw_zval_dup(return_value);
  - Z_TRY_ADDREF_P(zsocket);
  - sock->resource = zsocket;
  + sock->resource = sw_zval_dup(return_value);
  + Z_TRY_ADDREF_P(sock->resource);
  }
  #endif
  #endif
  