Workaround for IntersectCurve cycle error

NOTE: In the video I say that you can drive the crease with a second set of joints on the brow curve that move up and down, depending on your character you may be able to do that directly, but you may need to aim a joint from the center of the eye to the point on the curve or project the point on the curve onto a nurbs sphere centered on the eye (I have used the projection technique).