Fix compilation warnings
Fix compilation warnings

SimVascular/VTK,demarle/VTK,keithroe/vtkoptix,johnkit/vtk-dev,sumedhasingla/VTK,jmerkow/VTK,biddisco/VTK,ashray/VTK-EVM,msmolens/VTK,berendkleinhaneveld/VTK,SimVascular/VTK,SimVascular/VTK,ashray/VTK-EVM,ashray/VTK-EVM,gram526/VTK,sumedhasingla/VTK,collects/VTK,aashish24/VTK-old,gram526/VTK,berendkleinhaneveld/VTK,hendradarwin/VTK,collects/VTK,sankhesh/VTK,collects/VTK,ashray/VTK-EVM,spthaolt/VTK,mspark93/VTK,sumedhasingla/VTK,johnkit/vtk-dev,keithroe/vtkoptix,demarle/VTK,berendkleinhaneveld/VTK,gram526/VTK,naucoin/VTKSlicerWidgets,daviddoria/PointGraphsPhase1,jmerkow/VTK,gram526/VTK,gram526/VTK,jmerkow/VTK,ashray/VTK-EVM,arnaudgelas/VTK,naucoin/VTKSlicerWidgets,daviddoria/PointGraphsPhase1,jeffbaumes/jeffbaumes-vtk,ashray/VTK-EVM,sumedhasingla/VTK,jeffbaumes/jeffbaumes-vtk,berendkleinhaneveld/VTK,aashish24/VTK-old,sumedhasingla/VTK,biddisco/VTK,spthaolt/VTK,hendradarwin/VTK,mspark93/VTK,sumedhasingla/VTK,daviddoria/PointGraphsPhase1,demarle/VTK,hendradarwin/VTK,candy7393/VTK,johnkit/vtk-dev,spthaolt/VTK,arnaudgelas/VTK,gram526/VTK,SimVascular/VTK,johnkit/vtk-dev,spthaolt/VTK,mspark93/VTK,msmolens/VTK,candy7393/VTK,arnaudgelas/VTK,cjh1/VTK,demarle/VTK,SimVascular/VTK,jeffbaumes/jeffbaumes-vtk,daviddoria/PointGraphsPhase1,jmerkow/VTK,gram526/VTK,naucoin/VTKSlicerWidgets,cjh1/VTK,jeffbaumes/jeffbaumes-vtk,hendradarwin/VTK,candy7393/VTK,SimVascular/VTK,daviddoria/PointGraphsPhase1,hendradarwin/VTK,biddisco/VTK,jmerkow/VTK,sankhesh/VTK,keithroe/vtkoptix,msmolens/VTK,demarle/VTK,candy7393/VTK,arnaudgelas/VTK,johnkit/vtk-dev,candy7393/VTK,biddisco/VTK,mspark93/VTK,candy7393/VTK,keithroe/vtkoptix,spthaolt/VTK,demarle/VTK,arnaudgelas/VTK,sankhesh/VTK,collects/VTK,jeffbaumes/jeffbaumes-vtk,daviddoria/PointGraphsPhase1,naucoin/VTKSlicerWidgets,ashray/VTK-EVM,collects/VTK,arnaudgelas/VTK,mspark93/VTK,mspark93/VTK,msmolens/VTK,msmolens/VTK,cjh1/VTK,ashray/VTK-EVM,jmerkow/VTK,cjh1/VTK,mspark93/VTK,demarle/VTK,hendradarwin/VTK,sankhesh/VTK,SimVascular/VTK,aashish24/VTK-old,keithroe/vtkoptix,msmolens/VTK,collects/VTK,naucoin/VTKSlicerWidgets,berendkleinhaneveld/VTK,mspark93/VTK,sankhesh/VTK,johnkit/vtk-dev,aashish24/VTK-old,aashish24/VTK-old,spthaolt/VTK,jmerkow/VTK,msmolens/VTK,SimVascular/VTK,demarle/VTK,berendkleinhaneveld/VTK,berendkleinhaneveld/VTK,biddisco/VTK,keithroe/vtkoptix,spthaolt/VTK,sumedhasingla/VTK,hendradarwin/VTK,biddisco/VTK,keithroe/vtkoptix,naucoin/VTKSlicerWidgets,cjh1/VTK,gram526/VTK,sumedhasingla/VTK,sankhesh/VTK,candy7393/VTK,msmolens/VTK,biddisco/VTK,jeffbaumes/jeffbaumes-vtk,jmerkow/VTK,keithroe/vtkoptix,johnkit/vtk-dev,aashish24/VTK-old,candy7393/VTK,sankhesh/VTK,sankhesh/VTK,cjh1/VTK