Fehlerkorrekturen

lib/protocoll_messages/track_message.g.dart

@@ -7,7 +7,9 @@ part of 'track_message.dart';
 // **************************************************************************
 
 TrackMessage _$TrackMessageFromJson(Map<String, dynamic> json) => TrackMessage()
-  ..pos = TrackPosition.fromJson(json['pos'] as Map<String, dynamic>);
+  ..pos = json['pos'] == null
+      ? null
+      : TrackPosition.fromJson(json['pos'] as Map<String, dynamic>);
 
 Map<String, dynamic> _$TrackMessageToJson(TrackMessage instance) =>
     <String, dynamic>{