Fix bug on Mac OS X PPC platform
Fix bug on Mac OS X PPC platform

For some reason the OpenGL line type (stipple etc) was causing point
sprites not to render. Resetting back to a solid line fixes the issue
and is reasonable to do (restore expected state). Thanks to Sean
McBride for providing access to the failing machine.

Change-Id: Ia31ae087e4d830175a194643c4056fd4cc68208a

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