Added warning comment to Win7TouchInputDevice::calcClientAreaOffset().
Added warning comment to Win7TouchInputDevice::calcClientAreaOffset().

svn path=/trunk/libavg/; revision=9294

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