* "step_down" parameter was taken into account -> "None" should be used instead
* Closed #3425472 reported by Gene Miller - http://sourceforge.net/tracker/index.php?func=detail&aid=3425472&group_id=237831&atid=1104176


git-svn-id: https://pycam.svn.sourceforge.net/svnroot/pycam/trunk@1206 bbaffbd6-741e-11dd-a85d-61de82d9cad9