Revert r729; Altivec seems to work okay.
Revert r729; Altivec seems to work okay.

JanX2/Perian,JanX2/Perian,MaddTheSane/perian,MaddTheSane/perian,MaddTheSane/perian,MaddTheSane/perian,JanX2/Perian,JanX2/Perian,MaddTheSane/perian,MaddTheSane/perian,JanX2/Perian