Make wxPORTRAIT and wxLANDSCAPE elements of wxPrintOrientation enum.

Change wxPrintData::SetOrientation() to take wxPrintOrientation instead of
int.

Closes #11393.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62823 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/motif/dcprint.h

@@ -21,7 +21,7 @@ public:
     wxPrinterDCImpl(const wxString& driver, const wxString& device,
                     const wxString& output,
                     bool interactive = true,
-                    int orientation = wxPORTRAIT);
+                    wxPrintOrientation orientation = wxPORTRAIT);
     virtual ~wxPrinterDC();
 
     wxRect GetPaperRect() const;