Add PrivData() field to wxPrintData since MSW's printer

sometimes seem to save data in an extra field. The
    original author of the patch chose to save it in char*
    so I kept that, although void* would probably be correct.
    The patch is against 2.4.2 and the code has been reshuffled
    since then so that the patch had to be redone entirely.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@32443 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/printdlg.h

@@ -44,7 +44,7 @@ public:
     void SetDevMode(void* data) { m_devMode = data; }
     void* GetDevNames() const { return m_devNames; }
     void SetDevNames(void* data) { m_devNames = data; }
-    
+   
 private:
     void* m_devMode;
     void* m_devNames;