Windows warning fix.
Windows warning fix.

svn path=/trunk/libavg/; revision=4988

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