I'm not sure about the `getFlxFrameBitmapData()` call... It seems to fix it, but it might also be fairly expensive.. `FlxFrame.getBitmap()` does a lot of things, creating a new `BitmapData` with each call for example. But then again, I'm not even really sure what `FlxFrame` is in the first place, there isn't a single comment in that class. :/

@Beeblerox Why is `framePixels` null here on cpp targets / why do we have to use `getFlxFrameBitmapData()`? Is that a good idea?