[Paraview] Open vtk with zlib

[Brad King]

Sébastien Blaise wrote:
> vtkXMLDataParser (0xa02c998): Error reading beginning of compression 
> header. Read 0 of 12 bytes.

At quick glance your compression header writing code looks okay.  However,
this error occurs before the parser even tries to interpret the compression
header, so something else must be wrong.  Can you send me a small example
file produced by your writer, please (off list)?

Thanks,
-Brad