[gtk+] gdk: Add a get_setting vfunc to GdkDisplay

[Matthias Clasen <matthiasc src gnome org>]

commit f2055bfb7b039e542a7ab33a0c8dd7f255a3f0d8
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Oct 30 16:39:49 2017 -0400

    gdk: Add a get_setting vfunc to GdkDisplay
    
    This will eventually replace the GdkScreen vfunc of the
    same name.

 gdk/gdkdisplayprivate.h |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gdk/gdkdisplayprivate.h b/gdk/gdkdisplayprivate.h
index 16969e4..cc13008 100644
--- a/gdk/gdkdisplayprivate.h
+++ b/gdk/gdkdisplayprivate.h
@@ -222,6 +222,9 @@ struct _GdkDisplayClass
   GdkMonitor *           (*get_primary_monitor)        (GdkDisplay     *display);
   GdkMonitor *           (*get_monitor_at_window)      (GdkDisplay     *display,
                                                         GdkWindow      *window);
+  gboolean               (*get_setting)                (GdkDisplay     *display,
+                                                        const char     *name,
+                                                        GValue         *value);
 
   /* Signals */
   void                   (*opened)                     (GdkDisplay     *display);