change to use 64-bit functions when needed to avoid overflow
change to use 64-bit functions when needed to avoid overflow

kode54/flac,kode54/flac,Distrotech/flac,LordJZ/libflac,waitman/flac,LordJZ/libflac,fredericgermain/flac,LordJZ/libflac,kode54/flac,Distrotech/flac,fredericgermain/flac,waitman/flac,LordJZ/libflac,Distrotech/flac,waitman/flac,fredericgermain/flac,kode54/flac,waitman/flac,waitman/flac,fredericgermain/flac,Distrotech/flac