Fixed Bitmap allocation & blt for bitmaps > 2 GB.
Fixed Bitmap allocation & blt for bitmaps > 2 GB.

svn path=/trunk/libavg/; revision=9109

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