BUG: fix when src and dest were same.
BUG: fix when src and dest were same.

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