message: Init coro_poll_task members.
diff: @@ -815,10 +815,10 @@ string Coroutine::gethostbyname(const string &hostname, int domain, double timeo
  struct coro_poll_task
  {
  - swTimer_node *timer;
  - Coroutine *co;
  std::unordered_map<int, socket_poll_fd> *fds;
  - bool success;
  + Coroutine *co = nullptr;
  + swTimer_node *timer = nullptr;
  + bool success = false;
  };
  static std::unordered_map<int, coro_poll_task *> coro_poll_task_map;
  