Return early to avoid null to strcmp()
Return early to avoid null to strcmp()

Change-Id: I9f3ec522ecd1f96d12413342060508a1b990cc4d

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