Accept also M4A, m4a filetype description for MPEG4 audio files
Accept also M4A, m4a filetype description for MPEG4 audio files

...in itdb_track_set_defaults(). convert_filetype() already has it.

neuschaefer/libgpod,neuschaefer/libgpod,hyperair/libgpod,hyperair/libgpod,hyperair/libgpod,neuschaefer/libgpod,hyperair/libgpod,hyperair/libgpod,neuschaefer/libgpod,neuschaefer/libgpod