vtkTableBasedClipDataSet: Handle empty polydata due to aborted filter
Checking for empty inputs in the beginning of the execution is not enough since
the intermediate filter vtkPolyDataToUnstructuredGrid
returns empty output if
aborted.
To trace the error see
vtkTableBasedClipDataSet::ClipPolyData
-> vtkPolyDataToUnstructuredGrid
->vtkTableBasedClipDataSet::ClipTDataSet