Fix bus error on mac.  Was a result of not having null termination of arg list to sw_vers calls.
Fix bus error on mac.  Was a result of not having null termination of arg list to sw_vers calls.

johnkit/vtk-dev,berendkleinhaneveld/VTK,cjh1/VTK,hendradarwin/VTK,SimVascular/VTK,spthaolt/VTK,cjh1/VTK,cjh1/VTK,aashish24/VTK-old,hendradarwin/VTK,johnkit/vtk-dev,gram526/VTK,aashish24/VTK-old,sumedhasingla/VTK,spthaolt/VTK,sankhesh/VTK,demarle/VTK,hendradarwin/VTK,SimVascular/VTK,candy7393/VTK,jmerkow/VTK,hendradarwin/VTK,demarle/VTK,daviddoria/PointGraphsPhase1,msmolens/VTK,jmerkow/VTK,sumedhasingla/VTK,jeffbaumes/jeffbaumes-vtk,cjh1/VTK,ashray/VTK-EVM,jeffbaumes/jeffbaumes-vtk,Wuteyan/VTK,SimVascular/VTK,candy7393/VTK,jmerkow/VTK,cjh1/VTK,mspark93/VTK,johnkit/vtk-dev,biddisco/VTK,jeffbaumes/jeffbaumes-vtk,daviddoria/PointGraphsPhase1,msmolens/VTK,sankhesh/VTK,naucoin/VTKSlicerWidgets,arnaudgelas/VTK,aashish24/VTK-old,hendradarwin/VTK,ashray/VTK-EVM,spthaolt/VTK,collects/VTK,arnaudgelas/VTK,keithroe/vtkoptix,sankhesh/VTK,sankhesh/VTK,ashray/VTK-EVM,msmolens/VTK,demarle/VTK,Wuteyan/VTK,Wuteyan/VTK,Wuteyan/VTK,ashray/VTK-EVM,biddisco/VTK,sankhesh/VTK,candy7393/VTK,candy7393/VTK,ashray/VTK-EVM,daviddoria/PointGraphsPhase1,gram526/VTK,sumedhasingla/VTK,demarle/VTK,daviddoria/PointGraphsPhase1,keithroe/vtkoptix,ashray/VTK-EVM,jmerkow/VTK,naucoin/VTKSlicerWidgets,berendkleinhaneveld/VTK,mspark93/VTK,arnaudgelas/VTK,biddisco/VTK,keithroe/vtkoptix,mspark93/VTK,mspark93/VTK,keithroe/vtkoptix,berendkleinhaneveld/VTK,naucoin/VTKSlicerWidgets,candy7393/VTK,candy7393/VTK,keithroe/vtkoptix,gram526/VTK,spthaolt/VTK,demarle/VTK,sankhesh/VTK,sankhesh/VTK,ashray/VTK-EVM,SimVascular/VTK,SimVascular/VTK,johnkit/vtk-dev,biddisco/VTK,sumedhasingla/VTK,Wuteyan/VTK,msmolens/VTK,Wuteyan/VTK,collects/VTK,spthaolt/VTK,johnkit/vtk-dev,mspark93/VTK,berendkleinhaneveld/VTK,spthaolt/VTK,sumedhasingla/VTK,demarle/VTK,biddisco/VTK,johnkit/vtk-dev,collects/VTK,jmerkow/VTK,berendkleinhaneveld/VTK,candy7393/VTK,gram526/VTK,naucoin/VTKSlicerWidgets,gram526/VTK,ashray/VTK-EVM,gram526/VTK,keithroe/vtkoptix,collects/VTK,msmolens/VTK,johnkit/vtk-dev,aashish24/VTK-old,keithroe/vtkoptix,naucoin/VTKSlicerWidgets,mspark93/VTK,Wuteyan/VTK,jmerkow/VTK,biddisco/VTK,demarle/VTK,SimVascular/VTK,jmerkow/VTK,jeffbaumes/jeffbaumes-vtk,collects/VTK,mspark93/VTK,spthaolt/VTK,candy7393/VTK,hendradarwin/VTK,daviddoria/PointGraphsPhase1,jeffbaumes/jeffbaumes-vtk,keithroe/vtkoptix,msmolens/VTK,SimVascular/VTK,sumedhasingla/VTK,aashish24/VTK-old,gram526/VTK,sankhesh/VTK,berendkleinhaneveld/VTK,naucoin/VTKSlicerWidgets,msmolens/VTK,jeffbaumes/jeffbaumes-vtk,berendkleinhaneveld/VTK,aashish24/VTK-old,arnaudgelas/VTK,jmerkow/VTK,collects/VTK,hendradarwin/VTK,sumedhasingla/VTK,msmolens/VTK,gram526/VTK,arnaudgelas/VTK,mspark93/VTK,arnaudgelas/VTK,daviddoria/PointGraphsPhase1,biddisco/VTK,sumedhasingla/VTK,demarle/VTK,cjh1/VTK,SimVascular/VTK