COMP: Fix compilation on AIX
COMP: Fix compilation on AIX

Thanks to David Gobbi for pointing out the include order issue.

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