[gtk+] mir: clear screen objects correctly

[Marco Trevisan <marcotrevi src gnome org>]

commit a77571c42e6c5c65ae760f16a4f40b7d09aa67d1
Author: Marco Trevisan (Treviño) <mail 3v1n0 net>
Date:   Thu Nov 13 02:19:29 2014 +0100

    mir: clear screen objects correctly

 gdk/mir/gdkmirscreen.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gdk/mir/gdkmirscreen.c b/gdk/mir/gdkmirscreen.c
index 6911c06..c02efd6 100644
--- a/gdk/mir/gdkmirscreen.c
+++ b/gdk/mir/gdkmirscreen.c
@@ -166,8 +166,8 @@ gdk_mir_screen_finalize (GObject *object)
 
   mir_connection_set_display_config_change_callback (get_connection (screen), NULL, NULL);
   mir_display_config_destroy (screen->display_config);
-  g_clear_pointer (&screen->visual);
-  g_clear_pointer (&screen->root_window);
+  g_clear_object (&screen->visual);
+  g_clear_object (&screen->root_window);
 
   G_OBJECT_CLASS (gdk_mir_screen_parent_class)->finalize (object);
 }