fixed compiler warning
fixed compiler warning

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