Fixed check for mmc->fd (can be zero)
Fixed check for mmc->fd (can be zero)


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