[0.18] FEM: fix bugs found by Uwe Stöhr
Created by: berndhahnebach
-
Branch rebased on latest master git pull --rebase upstream master
-
Unit tests confirmed to pass by running ./bin/FreeCAD --run-test 0
-
Commit message is well-written -
Commit message includes issue #<id>
orfixes #<id>
where<id>
is the associated MantisBT issue id if one exists
https://forum.freecadweb.org/viewtopic.php?f=38&t=34847&p=293111#p293111 https://www.freecadweb.org/tracker/view.php?id=3886