[gtkmm] Widget: add get_scale_factor().

[Murray Cumming <murrayc src gnome org>]

commit c6b9ba6579e1cfe40c634e2db1ed216bbc47f9d4
Author: Murray Cumming <murrayc murrayc com>
Date:   Wed Aug 28 12:24:41 2013 +0200

    Widget: add get_scale_factor().

 gtk/src/widget.hg |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gtk/src/widget.hg b/gtk/src/widget.hg
index b3cf813..a95dc49 100644
--- a/gtk/src/widget.hg
+++ b/gtk/src/widget.hg
@@ -329,6 +329,8 @@ public:
 
   _WRAP_METHOD(bool has_screen() const, gtk_widget_has_screen)
 
+  _WRAP_METHOD(int get_scale_factor() const, gtk_widget_get_scale_factor)
+
   _WRAP_METHOD(Glib::RefPtr<Gdk::Display> get_display(), gtk_widget_get_display, refreturn)
   _WRAP_METHOD(Glib::RefPtr<const Gdk::Display> get_display() const, gtk_widget_get_display, refreturn, 
constversion)