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

interface/wx/defs.h

@@ -778,6 +778,15 @@ enum wxPaperSize
     wxPAPER_PENV_10_ROTATED     ///< PRC Envelope #10 Rotated 458 x 324 m
 };
 
+/**
+    Printing orientation
+*/
+
+enum wxPrintOrientation
+{
+   wxPORTRAIT,
+   wxLANDSCAPE
+};
 
 /**
     Duplex printing modes.