Revert "Prevent division by 0 by bailing early"
Revert "Prevent division by 0 by bailing early"

This reverts commit 5bb0f14f70. For some reason, this
commit causes some dashboard failures on Mac OS X 10.8:
crash when setting the cursor. It is not clear why but
we are temporarily reverting this commit to verify that
this fixes the problem.

Change-Id: I027af718fa0e441aa6d688a29978dcd2d9576710

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