height is smaller than the old height and makes sure we erase the entire area git-svn-id: svn://10.0.0.236/trunk@14921 18797224-902f-48f8-a5cc-f745e15eee43
height is smaller than the old height and makes sure we erase the entire area git-svn-id: svn://10.0.0.236/trunk@14921 18797224-902f-48f8-a5cc-f745e15eee43