alloc-dealloc-mismatch in vtkDataSetToNonOrthogonalDataSetTest #752
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This fixes #11762.
AddressSanitizer found an alloc-dealloc-mismatch in vtkDataSetToNonOrthogonalDataSetTest. The full error is in the ticket. Instead of fixing the delete, I replaced owning raw pointer with std::vector. Given the size of the array (16 elements) the extra copy is very fast and probably eliminated by return value optimization.
testing: Given the size of the change, code review is sufficient.