fix bug with implicit assumption in ia32 mmx routines, add more complete filling of subframe structure when reading
fix bug with implicit assumption in ia32 mmx routines, add more complete filling of subframe structure when reading

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