Disambiguation between errors and warnings when loading models

[stillonearth]

In some cases MuJoCo will throw an error such

Error loading model: Degenerate triangle found in mesh `trunk`, its orientation will not be checked.

I'm getting this from loading https://github.com/deepmind/mujoco_menagerie/blob/main/unitree_a1/a1.xml

Is there a way to distinguish fatal errors and warning programmatically with mj_loadXML?

[kevinzakka]

Note the degenerate triangle warning will be removed in the next release, see da33c59.