message: Fix aio cancel
diff: @@ -158,7 +158,7 @@ public:
  double _max_wait_time = _queue.get_max_wait_time();
  if (_max_wait_time > max_wait_time)
  {
  - size_t n = threads.size() * 2;
  + size_t n = threads.size();
  if (threads.size() + n > max_thread_num)
  {
  n = max_thread_num - threads.size();
  @@ -444,9 +444,12 @@ int swAio_callback(swReactor *reactor, swEvent *event)
  pool->release_thread(event->tid);
  delete event;
  }
  - else if (!event->canceled)
  + else
  + {
  + if (!event->canceled)
  {
  event->callback(events[i]);
  + }
  SwooleAIO.task_num--;
  delete event;
  }
  