vtkLagrangianParticleTracker.GetIntegrationModel segfaults
Using 9.2.5 from PyPI on Ubuntu (though it looks like it's a problem [for all OSes according to conda-forge's CIs](https://dev.azure.com/conda-forge/feedstock-builds/_build/results?buildId=640303&view=logs&jobId=d0d954b5-f111-5dc4-4d76-03b6c9d0cf7e&j=d0d954b5-f111-5dc4-4d76-03b6c9d0cf7e&t=841356e0-85bb-57d8-dbbc-852e683d1642)) as found by Mayavi:
```
>>> import faulthandler
>>> faulthandler.enable()
>>> import vtkmodules.vtkFiltersFlowPaths
>>> vtkmodules.vtkFiltersFlowPaths.vtkLagrangianParticleTracker().GetIntegrationModel()
Fatal Python error: Segmentation fault
Current thread 0x00007f4c2a2f6040 (most recent call first):
File "<stdin>", line 1 in <module>
Extension modules: vtkmodules.vtkCommonCore, vtkmodules.vtkCommonMath, vtkmodules.vtkCommonTransforms, vtkmodules.vtkCommonDataModel, vtkmodules.vtkCommonComputationalGeometry, vtkmodules.vtkCommonExecutionModel, vtkmodules.vtkFiltersFlowPaths (total: 7)
```
issue