[gtk+] mir: unset config change callback on finalize

[Marco Trevisan <marcotrevi src gnome org>]

commit c6de20496c4075a0f1daf8be450d8522aaaea82f
Author: Marco Trevisan (Treviño) <mail 3v1n0 net>
Date:   Thu Nov 13 01:34:10 2014 +0100

    mir: unset config change callback on finalize

 gdk/mir/gdkmirscreen.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gdk/mir/gdkmirscreen.c b/gdk/mir/gdkmirscreen.c
index 987f9ea..dedaa02 100644
--- a/gdk/mir/gdkmirscreen.c
+++ b/gdk/mir/gdkmirscreen.c
@@ -139,6 +139,8 @@ gdk_mir_screen_dispose (GObject *object)
 static void
 gdk_mir_screen_finalize (GObject *object)
 {
+  GdkMirScreen *screen = GDK_MIR_SCREEN (object);
+  mir_connection_set_display_config_change_callback (get_connection (screen), NULL, NULL);
   G_OBJECT_CLASS (gdk_mir_screen_parent_class)->finalize (object);
 }