[gtk+/wip/window-scales] widget: Add missing AVAILIBLE_IN

[Alexander Larsson <alexl src gnome org>]

commit 0ed5dbf9c4bb82dc6914ef3609ae33fb86dd1c50
Author: Alexander Larsson <alexl redhat com>
Date:   Tue Jul 2 16:17:18 2013 +0200

    widget: Add missing AVAILIBLE_IN

 gtk/gtkwidget.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkwidget.h b/gtk/gtkwidget.h
index c2a224d..72082b0 100644
--- a/gtk/gtkwidget.h
+++ b/gtk/gtkwidget.h
@@ -848,6 +848,7 @@ GDK_AVAILABLE_IN_ALL
 GdkScreen *   gtk_widget_get_screen      (GtkWidget *widget);
 GDK_AVAILABLE_IN_ALL
 gboolean      gtk_widget_has_screen      (GtkWidget *widget);
+GDK_AVAILABLE_IN_3_10
 gint          gtk_widget_get_scale_factor (GtkWidget *widget);
 GDK_AVAILABLE_IN_ALL
 GdkDisplay *  gtk_widget_get_display     (GtkWidget *widget);