Fix unreachable-code-break warnings.
Fix unreachable-code-break warnings.

This is the only class in VTK that raises this warning, so it seems
worthwhile to fix it.

Change-Id: Ieb601c7871e5470f2fd0b8f82e8b55749ef7a893

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