message: Add null check for transport.
diff: @@ -48,10 +48,10 @@ void TimeoutChecker::scheduleCheck() {
  void TimeoutChecker::scheduleNext() {
  scheduled_task_ = transport_->getWorker()->scheduleFromNow([this]() {
  + if (transport_ != nullptr) {
  if (transport_->getTransportState() == TRANSPORT_READY) {
  return;
  }
  - if (transport_ != nullptr) {
  if (max_checks_-- > 0) {
  ELOG_DEBUG("Handling dtls timeout, checks left: %d", max_checks_);
  if (socket_context_) {
  