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/defs.h

@@ -2543,10 +2543,11 @@ typedef enum
 } wxPaperSize;
 
 /* Printing orientation */
-#ifndef wxPORTRAIT
-#define wxPORTRAIT      1
-#define wxLANDSCAPE     2
-#endif
+enum wxPrintOrientation
+{
+   wxPORTRAIT = 1,
+   wxLANDSCAPE
+};
 
 /* Duplex printing modes
  */