message: fix swoole_client crash.
diff: @@ -348,6 +348,11 @@ static int swClient_close(swClient *cli)
  {
  SwooleG.main_reactor->del(SwooleG.main_reactor, fd);
  }
  + if (cli->timer)
  + {
  + swTimer_del(&SwooleG.timer, cli->timer);
  + cli->timer = NULL;
  + }
  //onClose callback
  if (cli->socket->active && cli->onClose)
  {
  