Fix vtkPointDataToCellData/vtkCellTreeLocator warnings and vtkParticleTracerBase errors

Spiros Tsalikisrequested to merge
spiros.tsalikis/vtk:fix-warnings into master

Fix warnings related to vtkPointDataToCellData introduced by !8957 (merged). Fix warnings related to vtkCellTreeLocator introduced by !9178 (merged). Fix errors related to vtkParticleTracerBase introduced by !9178 (merged).

Edited by Spiros Tsalikis

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