[issue 137] fix for streaming AA tracks
[issue 137] fix for streaming AA tracks

thebigmunch/gmusicapi,peetahzee/Unofficial-Google-Music-API,tanhaiwang/gmusicapi,simon-weber/Unofficial-Google-Music-API,TheOpenDevProject/gmusicapi,nvbn/Unofficial-Google-Music-API,simon-weber/gmusicapi,dvirtz/gmusicapi,dvirtz/gmusicapi