Bug0014435 Fix hyperstreamline segfault when no cell scalars.
Bug0014435 Fix hyperstreamline segfault when no cell scalars.

per http://www.vtk.org/Bug/view.php?id=14435

Thanks Raine for the patch.

Change-Id: I5b5bd31e630fc6faf5576a9af4459b681e366145

sankhesh/VTK,SimVascular/VTK,mspark93/VTK,hendradarwin/VTK,jmerkow/VTK,candy7393/VTK,msmolens/VTK,sumedhasingla/VTK,sumedhasingla/VTK,sankhesh/VTK,jmerkow/VTK,keithroe/vtkoptix,SimVascular/VTK,demarle/VTK,johnkit/vtk-dev,candy7393/VTK,demarle/VTK,sumedhasingla/VTK,ashray/VTK-EVM,mspark93/VTK,sankhesh/VTK,johnkit/vtk-dev,gram526/VTK,demarle/VTK,sankhesh/VTK,johnkit/vtk-dev,demarle/VTK,ashray/VTK-EVM,gram526/VTK,keithroe/vtkoptix,demarle/VTK,jmerkow/VTK,gram526/VTK,msmolens/VTK,gram526/VTK,msmolens/VTK,johnkit/vtk-dev,candy7393/VTK,mspark93/VTK,gram526/VTK,keithroe/vtkoptix,jmerkow/VTK,ashray/VTK-EVM,berendkleinhaneveld/VTK,gram526/VTK,mspark93/VTK,candy7393/VTK,msmolens/VTK,mspark93/VTK,gram526/VTK,msmolens/VTK,keithroe/vtkoptix,hendradarwin/VTK,sankhesh/VTK,sankhesh/VTK,candy7393/VTK,berendkleinhaneveld/VTK,msmolens/VTK,sankhesh/VTK,SimVascular/VTK,jmerkow/VTK,gram526/VTK,SimVascular/VTK,sumedhasingla/VTK,msmolens/VTK,mspark93/VTK,berendkleinhaneveld/VTK,keithroe/vtkoptix,sumedhasingla/VTK,hendradarwin/VTK,sankhesh/VTK,mspark93/VTK,SimVascular/VTK,sumedhasingla/VTK,ashray/VTK-EVM,SimVascular/VTK,johnkit/vtk-dev,hendradarwin/VTK,jmerkow/VTK,demarle/VTK,berendkleinhaneveld/VTK,ashray/VTK-EVM,candy7393/VTK,sumedhasingla/VTK,sumedhasingla/VTK,hendradarwin/VTK,johnkit/vtk-dev,keithroe/vtkoptix,keithroe/vtkoptix,SimVascular/VTK,keithroe/vtkoptix,ashray/VTK-EVM,jmerkow/VTK,candy7393/VTK,SimVascular/VTK,jmerkow/VTK,msmolens/VTK,ashray/VTK-EVM,berendkleinhaneveld/VTK,hendradarwin/VTK,demarle/VTK,mspark93/VTK,candy7393/VTK,hendradarwin/VTK,demarle/VTK,ashray/VTK-EVM,berendkleinhaneveld/VTK,berendkleinhaneveld/VTK,johnkit/vtk-dev