Camera YUV->RGB conversion speedups.
Camera YUV->RGB conversion speedups.

svn path=/trunk/libavg/; revision=1652

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