BUG: Add checks for a valid vertex id before indexing in to an array.
BUG: Add checks for a valid vertex id before indexing in to an array.

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