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backport a fix for a crash with module_mpi

David E. DeMarle requested to merge demarle/paraview-superbuild:fix-ospraymodulempi into master

VTK creates new shared OSPRay buffers and then immediately commits them. This exposes a bug in module_mpi. This patch will appear in module_mpi with OSPRay 2.6 or so and should be removed after that appears in ParaView.

Note: the buffer usage pattern is also inefficient with OSPRay's distributed mode rendering. VTK should be changes to avoid it at some point to.

partial fix for: paraview#20568 (closed)

Backport: release

Edited by David E. DeMarle

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