incorporate miroslav's speedup for little-endian 16bps mono/stereo
incorporate miroslav's speedup for little-endian 16bps mono/stereo

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