Suppress VTK warnings if the input part contains no faces (i.e., it contains only a wireframe)
If a part without any faces is loaded, Analysis Situs shows annoying VTK warnings:
ERROR: In W:\VTK\VTK-8.2.0\Filters\General\vtkTransformPolyDataFilter.cxx, line 85
vtkTransformPolyDataFilter (000001F02C1329E0): No input data
ERROR: In W:\VTK\VTK-8.2.0\Filters\General\vtkTransformPolyDataFilter.cxx, line 85
vtkTransformPolyDataFilter (000001F02C134B00): No input data
ERROR: In W:\VTK\VTK-8.2.0\Filters\General\vtkTransformPolyDataFilter.cxx, line 85
vtkTransformPolyDataFilter (000001F02C1329E0): No input data
ERROR: In W:\VTK\VTK-8.2.0\Filters\General\vtkTransformPolyDataFilter.cxx, line 85
vtkTransformPolyDataFilter (000001F02C134B00): No input data
ERROR: In W:\VTK\VTK-8.2.0\Filters\General\vtkTransformPolyDataFilter.cxx, line 85
vtkTransformPolyDataFilter (000001F02C1329E0): No input data
ERROR: In W:\VTK\VTK-8.2.0\Filters\General\vtkTransformPolyDataFilter.cxx, line 85
vtkTransformPolyDataFilter (000001F02C134B00): No input data
Let's get rid of these warnings, as wireframe inputs are totally fine for the app.
This ticket originates from the discussion here: http://analysissitus.org/forum/index.php?threads/usage-of-new-misc-convert-curves-api.333/post-2017