remove assert in scaleAlphaChannel
remove assert in scaleAlphaChannel

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