tag: added tag "AlbumArtistSort"

The tag_id3.c library supports both the documented "TSO2" tag, and the
inofficial TXXX/ALBUMARTISTSORT.

The Vorbis/FLAC decoder automatically supports the new tag, without
further change.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/tag.c b/src/tag.c
index 34205d20d..8648c0f77 100644
--- a/src/tag.c
+++ b/src/tag.c
@@ -45,6 +45,7 @@ const char *tag_item_names[TAG_NUM_OF_ITEM_TYPES] = {
 	"Artist",
 	"Album",
 	"AlbumArtist",
+	[TAG_ALBUM_ARTIST_SORT] = "AlbumArtistSort",
 	"Title",
 	"Track",
 	"Name",