Fixed windows crash on older systems.
Fixed windows crash on older systems.

svn path=/trunk/libavg/; revision=2898

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