Inputs in pqPipelineFilter are not suposed be optional
In pqPipelineFilter, optional input are not taken into account, which can lead to a Qt warning and a non active source when it should.
How to reproduce :
- checkout paraview master git
- edit filters.xml, in "Stream Tracer With Custom Source" filter, change InputProperty name from "SeedSource" to "ASeedSource"
- compile
- open paraview
- create wavelet, random vectors
- add a StreamTracer with custom source without selecting a source
- delete it
- previous input is not active and
Invalid index: 0
appears in console