WinGui: Fix a crash in the AudioViewModel when no Behaviour Tracks or fallback encode...

diff --git a/win/CS/HandBrakeWPF/ViewModels/AudioViewModel.cs b/win/CS/HandBrakeWPF/ViewModels/AudioViewModel.cs
index aacc4b7d28c4c31eb1d93d3a2da12f64da3e8269..610ad478eb6c25847d28f15f97a355c347c40d03 100644 (file)
--- a/win/CS/HandBrakeWPF/ViewModels/AudioViewModel.cs
+++ b/win/CS/HandBrakeWPF/ViewModels/AudioViewModel.cs
@@ -457,7 +457,7 @@ namespace HandBrakeWPF.ViewModels
 \r
         private bool CanAddTrack(AudioBehaviourTrack track, Audio sourceTrack, AudioEncoder fallback)\r
         {\r
-            if (fallback == AudioEncoder.None)\r
+            if (fallback == AudioEncoder.None && track != null)\r
             {\r
                 HBAudioEncoder encoderInfo = HandBrakeEncoderHelpers.GetAudioEncoder(EnumHelper<AudioEncoder>.GetShortName(track.Encoder));\r
                 if (track.IsPassthru && (sourceTrack.Codec & encoderInfo.Id) == 0)\r