ENH: vtkDescriptiveStatistics summary output contains expected columns even if the input is empty.
ENH: vtkDescriptiveStatistics summary output contains expected columns even if the input is empty.

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