Fixes #819
Fixes #819

Bitmap bounds were not invalidated after setting bitmapData

tschneidereit/shumway,tschneidereit/shumway,yurydelendik/shumway,yurydelendik/shumway,mozilla/shumway,mozilla/shumway,mbebenita/shumway,mbebenita/shumway,mozilla/shumway,tschneidereit/shumway,mozilla/shumway,yurydelendik/shumway,yurydelendik/shumway,mozilla/shumway,tschneidereit/shumway,tschneidereit/shumway,yurydelendik/shumway,mbebenita/shumway,mbebenita/shumway,mbebenita/shumway,yurydelendik/shumway,yurydelendik/shumway,mbebenita/shumway,tschneidereit/shumway,tschneidereit/shumway,mbebenita/shumway,tschneidereit/shumway,mozilla/shumway,mbebenita/shumway,yurydelendik/shumway,mozilla/shumway,mozilla/shumway