svpre fails with memory alloc error

[ktbolt]

The svpre program fails in geom_create_ratio_map() with a memory alloc error when creating bct data for the inlet face from a user's model

The alloc error is caused by the VTK vtkPointLocator object allocating gigabytes of memory until the os kills it, saw 64GB being used by svpre on my Mac before I killed it!

Meshing the model with a different edge size eliminates the problem.