Fixing issue with setting origin vertex.
Fixing issue with setting origin vertex.

Setting by array name and value then by index would still use
the array name and value. This fixes that problem.

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