Fix unreferenced formal warning on Release builds.
Fix unreferenced formal warning on Release builds.

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