Another attempt to get osx 10.6 to compile
Another attempt to get osx 10.6 to compile

Changing up the ifdef a bit

keithroe/vtkoptix,sankhesh/VTK,sumedhasingla/VTK,sumedhasingla/VTK,keithroe/vtkoptix,keithroe/vtkoptix,sankhesh/VTK,keithroe/vtkoptix,keithroe/vtkoptix,sankhesh/VTK,SimVascular/VTK,sumedhasingla/VTK,sankhesh/VTK,sankhesh/VTK,SimVascular/VTK,keithroe/vtkoptix,SimVascular/VTK,sankhesh/VTK,SimVascular/VTK,SimVascular/VTK,sumedhasingla/VTK,SimVascular/VTK,sumedhasingla/VTK,SimVascular/VTK,sumedhasingla/VTK,sankhesh/VTK,sumedhasingla/VTK,keithroe/vtkoptix,keithroe/vtkoptix,sankhesh/VTK,SimVascular/VTK,sumedhasingla/VTK