message: Check if wrtc still exists
diff: @@ -121,7 +121,7 @@ class Connection extends events.EventEmitter {
  }
  _resendLastAnswer(evt, streamId, label, forceOffer = false, removeStream = false) {
  - if (!this.wrtc.localDescription) {
  + if (!this.wrtc || !this.wrtc.localDescription) {
  return;
  }
  this.wrtc.localDescription = new SessionDescription(this.wrtc.getLocalDescription());
  