COMP: Fix KWSys SharedForward sign conversion
COMP: Fix KWSys SharedForward sign conversion

This uses size_t where necessary to avoid size_t/int conversion
warnings.

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