Fix AVM1 function interpretation to correctly reset the context after execution

I regressed this in eb10cd8f843a7a31bbef66d8f6f9611eed84f650 :/
Correctly export flash.geom members to AVM1
Override BitmapData#draw to resolve AS3 object for MovieClips before calling the super implementation

Otherwise, the underlying implementation throws because it doesn't expect AS2MovieClips.
Merge pull request #1463 from tschneidereit/nat

AVM1 fixes