bluray.c: use disc info instead of index
bluray.c: use disc info instead of index

mwgoldsmith/bluray,vlc-mirror/libbluray,ace20022/libbluray,koying/libbluray,mwgoldsmith/bluray,koying/libbluray,mwgoldsmith/bluray,EdwardNewK/libbluray,koying/libbluray,vlc-mirror/libbluray,ace20022/libbluray,tourettes/libbluray,Distrotech/libbluray,ace20022/libbluray,ShiftMediaProject/libbluray,ShiftMediaProject/libbluray,UIKit0/libbluray,Azzuro/libbluray,EdwardNewK/libbluray,Distrotech/libbluray,ShiftMediaProject/libbluray,Distrotech/libbluray,EdwardNewK/libbluray,UIKit0/libbluray,Azzuro/libbluray,Distrotech/libbluray,Azzuro/libbluray,Azzuro/libbluray,EdwardNewK/libbluray,koying/libbluray,UIKit0/libbluray,tourettes/libbluray,ace20022/libbluray,ShiftMediaProject/libbluray,vlc-mirror/libbluray,tourettes/libbluray,tourettes/libbluray,UIKit0/libbluray,mwgoldsmith/bluray,vlc-mirror/libbluray