message: Fix the compilation error without SSL.
diff: @@ -165,8 +165,8 @@ bool Socket::wait_event(const enum swEvent_type event, const void **__buf, size_
  #ifdef SW_USE_OPENSSL
  // maybe read_co and write_co are all waiting for the same event when we use SSL
  if (likely(want_event == SW_EVENT_NULL || !has_bound()))
  - {
  #endif
  + {
  if (likely(added_event == SW_EVENT_READ))
  {
  swReactor_remove_read_event(reactor, socket->fd);
  