message: improve: set buffer NULL
diff: @@ -220,10 +220,12 @@ int swReactor_close(swReactor *reactor, swSocket *socket)
  if (socket->out_buffer)
  {
  swBuffer_free(socket->out_buffer);
  + socket->out_buffer = NULL;
  }
  if (socket->in_buffer)
  {
  swBuffer_free(socket->in_buffer);
  + socket->in_buffer = NULL;
  }
  swTraceLog(SW_TRACE_CLOSE, "fd=%d", socket->fd);
  