Just enumeration of all types of frames. Added for faster type detection with less usage of casting.
@:value(cast 2)@:impl@:enuminlineread onlyEMPTY:FlxFrameType = 2
@:value(cast 3)@:impl@:enuminlineread onlyGLYPH:FlxFrameType = 3
@:value(cast 0)@:impl@:enuminlineread onlyREGULAR:FlxFrameType = 0