[Paraview] Structured Grid Blanking and Scalar Ranges

[Sean Ziegeler]

I'm working on a new reader that creates a vtkStructuredGrid and sets
the point visibility array for invalid values.  It works fine, except 
that it doesn't affect the scalar ranges.  Looking at the code, I can 
see that vtkPVArrayInformation does indeed not take the blanking array 
into account for structured grids.  It also looks like changing that 
behavior would be involved, as it processes each scalar array without 
regard to its respective containing data set, so I'm not going to worry 
about that just yet.

Is there some other way to set the scalar range manually?

Preferably in such a way that the manual range is maintained when passed
through filters, but that's probably a bit much to ask.

I'm working with 3.1.0 right now, but I'm willing to switch to head if 
necessary.

Thanks,
Sean