Fixed null dereference
Fixed null dereference

Body of an ‘if’ set ‘ef = null’ then next ‘if’
unconditionally dereferenced it.

Change-Id: I1decc17579c5c9f7d3bfc5c5dc45ebb328573529

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