Minor compiler warning fix
Minor compiler warning fix

sumedhasingla/VTK,msmolens/VTK,SimVascular/VTK,mspark93/VTK,jmerkow/VTK,SimVascular/VTK,msmolens/VTK,keithroe/vtkoptix,mspark93/VTK,candy7393/VTK,candy7393/VTK,mspark93/VTK,jmerkow/VTK,sumedhasingla/VTK,sumedhasingla/VTK,msmolens/VTK,mspark93/VTK,jmerkow/VTK,gram526/VTK,msmolens/VTK,demarle/VTK,SimVascular/VTK,demarle/VTK,sankhesh/VTK,sankhesh/VTK,SimVascular/VTK,demarle/VTK,sumedhasingla/VTK,keithroe/vtkoptix,mspark93/VTK,jmerkow/VTK,keithroe/vtkoptix,sumedhasingla/VTK,gram526/VTK,sankhesh/VTK,demarle/VTK,SimVascular/VTK,SimVascular/VTK,demarle/VTK,candy7393/VTK,mspark93/VTK,gram526/VTK,SimVascular/VTK,demarle/VTK,jmerkow/VTK,mspark93/VTK,candy7393/VTK,msmolens/VTK,gram526/VTK,sankhesh/VTK,gram526/VTK,keithroe/vtkoptix,sankhesh/VTK,keithroe/vtkoptix,jmerkow/VTK,demarle/VTK,msmolens/VTK,sankhesh/VTK,msmolens/VTK,jmerkow/VTK,msmolens/VTK,demarle/VTK,gram526/VTK,mspark93/VTK,gram526/VTK,jmerkow/VTK,sumedhasingla/VTK,keithroe/vtkoptix,sankhesh/VTK,candy7393/VTK,candy7393/VTK,keithroe/vtkoptix,candy7393/VTK,keithroe/vtkoptix,sumedhasingla/VTK,sankhesh/VTK,sumedhasingla/VTK,SimVascular/VTK,candy7393/VTK,gram526/VTK