use RETURN_STR_OR_EMPTY whenever a string is returned, do no return disc artist for track if CDDB_F_NO_TRACK_ARTIST is set
use RETURN_STR_OR_EMPTY whenever a string is returned,
do no return disc artist for track if CDDB_F_NO_TRACK_ARTIST is set

qyot27/libcddb,qyot27/libcddb