BUG: Return 0 for length if there are no points.Otherwise, overflow occurs.
BUG: Return 0 for length if there are no points.Otherwise, overflow occurs.

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