fix some compiler warnings hopefully
fix some compiler warnings hopefully

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