BUG: Truncate to known font space for now.
BUG: Truncate to known font space for now.

Allowing this number to be influenced by the unknown font enum was
causing segfaults. It the font is unknown then map it to Arial.

Change-Id: I34397d59adcca44e3f9349028bf9f60eb58348ae

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