Audio key error for AAC

[corny]

If I select AudioFile_AAC_320 or AudioFile_AAC_160 I get an Audio key error!

Steps to reproduce the issue:

	var selectedFile *Spotify.AudioFile
	for _, file := range track.Alternative[0].File {
		if file.GetFormat() == Spotify.AudioFile_AAC_160 {
			selectedFile = file
		}
	}

	audioFile, err := session.Player().LoadTrack(selectedFile, track.GetGid())

[joonas-fi]

Replicates for me, too. Vorbis works fine.