7e2926233d
Regression in [0] which moved the logic from
knife_closest_constrain_to_edge from 2D to 3D space.
The 3D location used (kcd->curr.cage) didn't have constraints
applied, causing snap not to lock to the constrained axis.
Resolve by passing in the constrained location which is then used when
edge snapping is calculated.
[0]: 7249b78b6b