COMP: Fix warning on MSVC71 compiler.
COMP: Fix warning on MSVC71 compiler.

Change-Id: I5b1fc99d02341d85f4be9c5d2fd9b49699f03577

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