Fix a crash in ITKCuberille

Case `9021791-right-96 MONTH` causes a crash. Minimal reproduction image is tracked here: https://github.com/InsightSoftwareConsortium/ITKCuberille/pull/80.

If we don't end up fixing the crash, we should consider changing [the parameters](https://github.com/uncbiag/OAI_analysis_2/blob/da8644197948719c59adb31935802086a1abb627/oai_analysis/mesh_processing.py#L380-L383).