ENH: verify that numbers of rows and columns are not < 0 PERF: it is not necessary to look at the size of the column selection; if       it is empty, then nothing will happen
ENH: verify that numbers of rows and columns are not < 0
PERF: it is not necessary to look at the size of the column selection; if
      it is empty, then nothing will happen

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