fix memory leak
fix memory leak

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