message: Fix aio shutdown
diff: @@ -303,7 +303,7 @@ private:
  {
  if (_cv.wait_for(lock, chrono::microseconds((size_t) (max_idle_time * 1000 * 1000))) == cv_status::timeout)
  {
  - if (n_closing != 0)
  + if (running && n_closing != 0)
  {
  // wait for the next round
  continue;
  