uilib branch: Allow scrollbar range max < min for flipped ranges.
uilib branch: Allow scrollbar range max < min for flipped ranges.

svn path=/branches/libavg_uilib/; revision=7873

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