message: Fix the null timer bug.
diff: @@ -668,8 +668,6 @@ static void http_client_coro_onError(swClient *cli)
  swTraceLog(SW_TRACE_HTTP_CLIENT, "connect error, object handle=%d", sw_get_object_handle(zobject));
  - http_client *http = swoole_get_object(zobject);
  - http->timer = NULL;
  http_client_free(zobject TSRMLS_CC);
  http_client_property *hcc = swoole_get_property(zobject, http_client_coro_property_request);
  