When using vtkSetStringMacro, the string should be set to NULL in the destructor.
When using vtkSetStringMacro, the string should be set to NULL in the destructor.

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