adding directory contents to ogg123 playing in sorted order?

Would a patch to ogg123 for using scandir(3) and alphasort(3) instead
of opendir(3) and readdir(3) in playlist_append_directory() be
accepted, or are those not sufficiently portable? On Linux,
_SVID_SOURCE or _BSD_SOURCE is required to use them. This shouldn't be
hard to implement and I'd like very much to have directories added to
the playlist in sorted order.