Restored utilization of NeedBuild2D ivar for speed
Restored utilization of NeedBuild2D ivar for speed

Change-Id: I238fbda324afcef04372c8a495ef1df3f6229485

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