[Paraview] bug in ImageReader DataExtent property

[Anton Shterenlikht]

I reported bug 13953.

However, I found that the source of the problem is
DataExtent property. This:

        reader=ImageReader(FilePrefix="z.raw")
        reader.DataExtent=[0,39,0,39,0,39]

works, while:

        reader=ImageReader(FilePrefix="z.raw")
        reader.DataExtent=[1,40,1,40,1,40]

gives the MPI error I reported in 13953.

I think this is clearly a bug.
The whole point of DataExtent property
is not to depend on any assumptions on
default array extents.

Can somebody comment please

Shall I open another PR on this and close 13953?

Thanks

Anton