C++: Support detecting IFC4X3_ADD2 schema

[thbeu]

Detect IFC4X3_ADD2 as IFC4x3, not IFC2x3.

[beachtom]

Thanks - but what issue is this solving? I think IFC4X3_ADD2 is already encoded in our schema map - so this shouldn't be needed. I think we are fixing a symptom here and not the route issue. Can you share an IFC file that is failing and I will check it.

[thbeu]

Any IFC with schema IFC4X3_ADD2 is detected as IFC2X3. This PR fixes the issue.

[beachtom]

I've just tested on main with an IFC4X3_ADD2 schema file and it detected it as IFC4X3_ADD2 can you share the files that are going wrong?

[thbeu]

For example: blue_cube.zip

Sorry, forgot to mention that I am on latest release being v0.0.77.

[thbeu]

Alternatively, you could fix schema-functions.cpp and ifc-schema.h to support the same set of schemas as in TS code. This PR seems to be rather a workaround.

[beachtom]

Okay - I get you - it is the C++ schema detection that is failing - leave it with me for a bit

[beachtom]

I have prepared: #2020 which should fix this