multicontext branch: avg_checkspeed works for arbitrary window sizes.
multicontext branch: avg_checkspeed works for arbitrary window sizes.

svn path=/branches/experiments/libavg_multicontext/; revision=9528

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