Fix failing navmesh for static meshes

[Doprez]

PR Details

There seems to be a common error that I think comes from GameStudio. This error makes references not available when processors attempt to reference them in code.

This is a band-aid fix that should resolve issues with reading static mesh data that's not available.

A bit of added info, this seems to only affect procedural meshes.. not sure why that would be.

Related Issue

https://github.com/stride3d/stride/issues/2326

Types of changes

• [ ] Docs change / refactoring / dependency upgrade
• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• [ ] My change requires a change to the documentation.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.
• [x] I have built and run the editor to try this change out.

[Doprez]

Some more research may be needed here. This got rid of the first hurdle but now it seems to crash when a second static mesh collider is added.

[Eideren]

Cool, I'll mark this as wip then