Speed up _v2 BitmapData.getRGBAPixels (closes #435)
Speed up _v2 BitmapData.getRGBAPixels (closes #435)

NenadBojkovski/openfl,openfl/openfl,Gama11/openfl,NenadBojkovski/openfl,Gama11/openfl,openfl/openfl,Gama11/openfl,Gama11/openfl,openfl/openfl