Splitted mmc_read_vid() and added error checking
Splitted mmc_read_vid() and added error checking


mwgoldsmith/aacs,zxlooong/libaacs,zxlooong/libaacs,mwgoldsmith/aacs,ShiftMediaProject/libaacs,ShiftMediaProject/libaacs,rraptorr/libaacs,rraptorr/libaacs