[Paraview] problems with repeatable input to filter

[Jeff Baumes]

> void vtkBlahFilter::SetDataSet1Connection(vtkAlgorithmOutput* algOutput)
> {
>  this->SetInputConnection(0, algOutput);
> }
> void vtkBlahFilter::SetDataSet2Connection(vtkAlgorithmOutput* algOutput)
> {
>  this->SetInputConnection(0, algOutput);
> }

Burlen's code looks right, but I believe the SetDataSet2Connection
should be like this (change 0 to 1):

void vtkBlahFilter::SetDataSet2Connection(vtkAlgorithmOutput* algOutput)
 {
 this->SetInputConnection(1, algOutput);
}