Blender Git Commit Log

Fix #36042: Subdividing a cyclic spline shifts start/end points

Issue goes back to 2.4x days at least (but very much likely the
issue is even older). It's caused by subdivision code was starting
to iterate points from previous one, which shifted all the points
by one.

Reshuffled code so now iteration starts from first spline point.

Thanks to Campbell for review and tests! :)