BUG: Don't render a box around an empty legend.
BUG: Don't render a box around an empty legend.

berendkleinhaneveld/VTK,candy7393/VTK,ashray/VTK-EVM,cjh1/VTK,sumedhasingla/VTK,demarle/VTK,biddisco/VTK,sankhesh/VTK,sankhesh/VTK,SimVascular/VTK,SimVascular/VTK,msmolens/VTK,keithroe/vtkoptix,ashray/VTK-EVM,collects/VTK,johnkit/vtk-dev,spthaolt/VTK,candy7393/VTK,candy7393/VTK,sankhesh/VTK,candy7393/VTK,biddisco/VTK,keithroe/vtkoptix,mspark93/VTK,sumedhasingla/VTK,keithroe/vtkoptix,sankhesh/VTK,jmerkow/VTK,hendradarwin/VTK,gram526/VTK,SimVascular/VTK,hendradarwin/VTK,mspark93/VTK,hendradarwin/VTK,sumedhasingla/VTK,biddisco/VTK,mspark93/VTK,hendradarwin/VTK,demarle/VTK,demarle/VTK,gram526/VTK,msmolens/VTK,SimVascular/VTK,sankhesh/VTK,biddisco/VTK,sumedhasingla/VTK,berendkleinhaneveld/VTK,keithroe/vtkoptix,jmerkow/VTK,mspark93/VTK,sankhesh/VTK,keithroe/vtkoptix,daviddoria/PointGraphsPhase1,daviddoria/PointGraphsPhase1,ashray/VTK-EVM,collects/VTK,hendradarwin/VTK,demarle/VTK,gram526/VTK,ashray/VTK-EVM,candy7393/VTK,SimVascular/VTK,hendradarwin/VTK,johnkit/vtk-dev,candy7393/VTK,gram526/VTK,sumedhasingla/VTK,spthaolt/VTK,cjh1/VTK,keithroe/vtkoptix,sumedhasingla/VTK,berendkleinhaneveld/VTK,cjh1/VTK,msmolens/VTK,SimVascular/VTK,mspark93/VTK,ashray/VTK-EVM,aashish24/VTK-old,msmolens/VTK,jmerkow/VTK,jmerkow/VTK,daviddoria/PointGraphsPhase1,johnkit/vtk-dev,msmolens/VTK,biddisco/VTK,mspark93/VTK,spthaolt/VTK,candy7393/VTK,spthaolt/VTK,jmerkow/VTK,daviddoria/PointGraphsPhase1,berendkleinhaneveld/VTK,johnkit/vtk-dev,msmolens/VTK,biddisco/VTK,candy7393/VTK,daviddoria/PointGraphsPhase1,berendkleinhaneveld/VTK,demarle/VTK,aashish24/VTK-old,jmerkow/VTK,aashish24/VTK-old,johnkit/vtk-dev,ashray/VTK-EVM,keithroe/vtkoptix,sumedhasingla/VTK,spthaolt/VTK,msmolens/VTK,aashish24/VTK-old,sankhesh/VTK,collects/VTK,mspark93/VTK,sumedhasingla/VTK,collects/VTK,ashray/VTK-EVM,demarle/VTK,gram526/VTK,jmerkow/VTK,cjh1/VTK,cjh1/VTK,biddisco/VTK,johnkit/vtk-dev,msmolens/VTK,gram526/VTK,ashray/VTK-EVM,spthaolt/VTK,cjh1/VTK,berendkleinhaneveld/VTK,gram526/VTK,aashish24/VTK-old,gram526/VTK,johnkit/vtk-dev,collects/VTK,demarle/VTK,mspark93/VTK,berendkleinhaneveld/VTK,collects/VTK,spthaolt/VTK,hendradarwin/VTK,SimVascular/VTK,keithroe/vtkoptix,aashish24/VTK-old,SimVascular/VTK,daviddoria/PointGraphsPhase1,demarle/VTK,sankhesh/VTK,jmerkow/VTK