BUG: Fix Bug #157 - OBJExporter crashes if a mapper has no input
BUG: Fix Bug #157 - OBJExporter crashes if a mapper has no input

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