BUG#489: Work-around for conflict between windows.h and jpeglib.h on cygwin.  This allows VTK_USE_SYSTEM_JPEG to work on cygwin.
BUG#489: Work-around for conflict between windows.h and jpeglib.h on cygwin.  This allows VTK_USE_SYSTEM_JPEG to work on cygwin.

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