Fix coprocessing py script typo
A bug was introduced recently in !2459 (merged) that produces errors when using coprocessor.py
script. This MR fixes the bug.
Note: Unfortunately, the tests on the Catalyst examples pass whereas those errors happen. We will have to make sure this won't happen anymore.
Traceback (most recent call last):
File "<string>", line 2, in <module>
File "feslicescript.py", line 75, in RequestDataDescription
File "/home/joachim/dev/paraview-build/lib/python3.6/site-packages/paraview/coprocessing.py", line 181, in LoadRequestedData
datadescription.GetInputDescriptionByName(writerinputinput).AllFieldsOn()
NameError: name 'writerinputinput' is not defined
Edited by Joachim Pouderoux