correct lut scaling for 8-bit and 12-bit upper volumes
correct lut scaling for 8-bit and 12-bit upper volumes

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