KWSys: Fix process tree kill on 64-bit Windows
KWSys: Fix process tree kill on 64-bit Windows

We enumerate processes to identify those whose parent is being killed so
that we can recursively kill the children.  Enumeration uses the
Process32(First|Next) windows API functions, which accept PROCESSENTRY32
objects to be filled.  This commit corrects the declaration of the entry
structure to account for its size on 64-bit Windows.

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