fix GetLoftWithCutOuts() in CCPACSWing crashes without warning (Issue #1022)

[merakulix]

Description

See Issue #1022.

Changed CCPACSWing::GetLoftWithCutOuts() to return a warning and a clean shape if no control surfaces are defined.

How Has This Been Tested?

Added Unittest to tiglWing.cpp to assert that warning is thrown and shape is valid.

Screenshots, that help to understand the changes(if applicable):

Checklist:

• A test for the new functionality was added.
• All tests run without failure.
• The new code complies with the TiGL style guide.
• New classes have been added to the Python interface.
• API changes were documented properly in tigl.h.

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 70.04%. Comparing base (a334bd3) to head (f84420b).
Report is 4 commits behind head on master.

Files with missing lines	Patch %	Lines
src/wing/CCPACSWing.cpp	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1023      +/-   ##
==========================================
+ Coverage   70.03%   70.04%   +0.01%     
==========================================
  Files         301      301              
  Lines       24312    24315       +3     
==========================================
+ Hits        17026    17031       +5     
+ Misses       7286     7284       -2     

Flag	Coverage Δ
unittests	70.04% <75.00%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/wing/CCPACSWing.cpp	78.07% <75.00%> (+0.54%)	⬆️

[joergbrech]

Thanks for the quick fix with unit test! I found one small issue with the usage of GTests test fixtures.

[joergbrech]

Thanks @merakulix 🎉