1. fixed (to test) the bug with bitmaps without masks in wxImageList

2. reorganized wxImageList a bit, created a new wxInvertMask() function
3. an incredibly ugly fix (?) for "unsatisfied constraints" warnings
4. added wxIcon and wxBitmap ctors from XPM
5. XPM handler now creates bitmaps with mask
6. added wxPrinterDC::BitBlt() and DrawBitmap(), cleared the horrible mess in
   the wxDC methods with the same names


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5571 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/dc.h

@@ -138,6 +138,9 @@ public:
         m_bOwnsDC = bOwnsDC;
     }
 
+    const wxBitmap& GetSelectedBitmap() const { return m_selectedBitmap; }
+    wxBitmap& GetSelectedBitmap() { return m_selectedBitmap; }
+
 protected:
     virtual void DoFloodFill(wxCoord x, wxCoord y, const wxColour& col,
                              int style = wxFLOOD_SURFACE);