removed unneccessary sqrt() in blob tracking loop
removed unneccessary sqrt() in blob tracking loop

svn path=/trunk/libavg/; revision=3149

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