Fix apple ifdef
Fix apple ifdef

jmerkow/VTK,msmolens/VTK,candy7393/VTK,jmerkow/VTK,keithroe/vtkoptix,sumedhasingla/VTK,demarle/VTK,SimVascular/VTK,gram526/VTK,keithroe/vtkoptix,mspark93/VTK,msmolens/VTK,mspark93/VTK,mspark93/VTK,gram526/VTK,candy7393/VTK,msmolens/VTK,mspark93/VTK,jmerkow/VTK,SimVascular/VTK,sankhesh/VTK,mspark93/VTK,mspark93/VTK,candy7393/VTK,jmerkow/VTK,candy7393/VTK,gram526/VTK,sankhesh/VTK,msmolens/VTK,sankhesh/VTK,msmolens/VTK,keithroe/vtkoptix,mspark93/VTK,mspark93/VTK,sumedhasingla/VTK,demarle/VTK,gram526/VTK,demarle/VTK,keithroe/vtkoptix,keithroe/vtkoptix,sumedhasingla/VTK,msmolens/VTK,sankhesh/VTK,candy7393/VTK,jmerkow/VTK,gram526/VTK,sankhesh/VTK,demarle/VTK,SimVascular/VTK,jmerkow/VTK,SimVascular/VTK,candy7393/VTK,jmerkow/VTK,sumedhasingla/VTK,gram526/VTK,SimVascular/VTK,sankhesh/VTK,candy7393/VTK,demarle/VTK,SimVascular/VTK,sumedhasingla/VTK,msmolens/VTK,demarle/VTK,sankhesh/VTK,SimVascular/VTK,sumedhasingla/VTK,keithroe/vtkoptix,jmerkow/VTK,gram526/VTK,keithroe/vtkoptix,gram526/VTK,SimVascular/VTK,sumedhasingla/VTK,candy7393/VTK,demarle/VTK,demarle/VTK,sumedhasingla/VTK,sankhesh/VTK,msmolens/VTK,keithroe/vtkoptix