[gnome-desktop] Don't fall over if RANDR is missing

[Matthias Clasen <matthiasc src gnome org>]

commit aa93854f2ba6b0f72f1bdff9699b5724a72c89c9
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Apr 30 20:48:03 2011 -0400

    Don't fall over if RANDR is missing
    
    When RANDR is not present, the screen object never gets an info,
    and since screen_info_free asserts, we must not call it unconditionally
    in finalize.
    This fixes https://bugzilla.gnome.org/show_bug.cgi?id=649053

 libgnome-desktop/gnome-rr.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/libgnome-desktop/gnome-rr.c b/libgnome-desktop/gnome-rr.c
index 4a9d98e..eb3d735 100644
--- a/libgnome-desktop/gnome-rr.c
+++ b/libgnome-desktop/gnome-rr.c
@@ -748,7 +748,8 @@ gnome_rr_screen_finalize (GObject *gobject)
 
     gdk_window_remove_filter (screen->priv->gdk_root, screen_on_event, screen);
 
-    screen_info_free (screen->priv->info);
+    if (screen->priv->info)
+      screen_info_free (screen->priv->info);
 
     G_OBJECT_CLASS (gnome_rr_screen_parent_class)->finalize (gobject);
 }