message: Fix null ptr error.
diff: @@ -1120,6 +1120,11 @@ static void http2_client_onClose(swClient *cli)
  {
  zval *zobject = (zval *) cli->object;
  + if (!cli->object)
  + {
  + return;
  + }
  +
  zend_update_property_bool(swoole_http2_client_coro_ce_ptr, zobject, ZEND_STRL("connected"), 0);
  zend_update_property_long(swoole_http2_client_coro_ce_ptr, zobject, ZEND_STRL("errCode"), SwooleG.error);
  zend_update_property_string(swoole_http2_client_coro_ce_ptr, zobject, ZEND_STRL("errMsg"), swoole_strerror(SwooleG.error));
  