use wxStockCursor (as documented and as already implemented in wxMotif) instead of a plain 'int'

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@55837 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/cursor.h

@@ -23,7 +23,7 @@ class WXDLLIMPEXP_CORE wxCursor : public wxGDIObject
 {
 public:
     wxCursor();
-    wxCursor( int cursorId );
+    wxCursor( wxStockCursor cursorId );
 #if wxUSE_IMAGE
     wxCursor( const wxImage & image );
 #endif