Fixed powerpc video decoding.
Fixed powerpc video decoding.

svn path=/trunk/libavg/; revision=4472

libavg/libavg,scotty007/libavg,libavg/libavg,scotty007/libavg,scotty007/libavg,yyd01245/libavg,hoodie/libavg,scotty007/libavg,libavg/libavg,th3infinity/libavg,th3infinity/libavg,yyd01245/libavg,hoodie/libavg,th3infinity/libavg,yyd01245/libavg,libavg/libavg,th3infinity/libavg,yyd01245/libavg,hoodie/libavg,hoodie/libavg