fix a bug in triangle frustum intersection
fix a bug in triangle frustum intersection

Change-Id: I9b39632a0f42d07453fd3744fa9920dbb979fed7

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