fix case indetification in linear transformation revert

The if forgot to check for squareness of matrix

assigned to @j.jadebeck

created branch 49-fix-case-indetification-in-linear-transformation-revert to address this issue

mentioned in merge request !56 (merged)

mentioned in commit f1d4a35e

closed with merge request !56 (merged)

unassigned @j.jadebeck