[Paraview] error calling Delete in python script

[Tony McDaniel]

I was able to reproduce this error in Paraview 3.98.1 64-bit on MacOS X 
10.8.5 with the following code:

s = Sphere()
c = Contour()
Delete(c)

Which returns the error:

ERROR: In 
/Users/kitware/Dashboards/MyTests/NightlyMaster/ParaViewSuperbuild-Release/paraview/src/paraview/ParaViewCore/ServerManager/Core/vtkSMProxyListDomain.cxx, 
line 189
vtkSMProxyListDomain (0x11db65670): Index 2 greater than max 1

However, the Contour filter is actually deleted from the pipeline.

Interestingly, saving the following as pvtest.py and running it from the 
terminal does not result in an error:

#!/usr/bin/env pvpython
# encoding: utf-8
from paraview.simple import *

s = Sphere()
c = Contour()
Delete(c)

Info on pvpython:

~ $ which pvpython
/Applications/paraview.app/Contents/bin/pvpython

~ $ pvpython
Python 2.6.7 (r267:88850, Oct 11 2012, 20:15:00)
[GCC 4.2.1 Compatible Apple Clang 4.0 (tags/Apple/clang-418.0.60)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
> >>
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