fix infovis
fix infovis

tests segfault when they can't make a vtkTextMapper

Change-Id: I750386307c0dfe8231d9107e956eb5946cddf521

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