Fix ICE candidate handling to ensure WebSocket is not nil before writing to signaling channel (jetkvm#1087)

Author: adamshiervani

webrtc.go

@@ -369,7 +369,7 @@ func newSession(config SessionConfig) (*Session, error) {
 
 	peerConnection.OnICECandidate(func(candidate *webrtc.ICECandidate) {
 		scopedLogger.Info().Interface("candidate", candidate).Msg("WebRTC peerConnection has a new ICE candidate")
-		if candidate != nil {
+		if candidate != nil && config.ws != nil {
 			err := wsjson.Write(context.Background(), config.ws, gin.H{"type": "new-ice-candidate", "data": candidate.ToJSON()})
 			if err != nil {
 				scopedLogger.Warn().Err(err).Msg("failed to write new-ice-candidate to WebRTC signaling channel")