GHE dimensions sometimes give errors on shape when they shouldn't

[vtnate]

Expected Behavior

This calculation should always provide valid "discriminants" for any rectangle.

Actual Behavior

Creating something close to square in the internal UI gives values that trigger the ValueError in the code above.

Steps to Reproduce

Version Information

Modelica Buildings Library: X.Y.Z
Modelica Standard Library: X.Y.Z
TEASER: X.Y.Z
Python: X.Y.Z