[at-spi2-atk] Fix an errant g_object_unref

[Mike Gorse <mgorse src gnome org>]

commit da10ef8b744bf7b04d18bda4cead3a9d71548a3e
Author: Mike Gorse <mgorse suse com>
Date:   Mon Sep 17 19:06:40 2012 -0500

    Fix an errant g_object_unref
    
    If an object is deregistered but not in the cache, then only unref it if
    it was found in the queue of objects to be added (ie, it is possible
    that it is leased, rather than queued to be cached, in which case it
    should not be unrefed).

 atk-adaptor/accessible-cache.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/atk-adaptor/accessible-cache.c b/atk-adaptor/accessible-cache.c
index 3a30b51..be247e4 100644
--- a/atk-adaptor/accessible-cache.c
+++ b/atk-adaptor/accessible-cache.c
@@ -179,9 +179,8 @@ remove_object (GObject * source, GObject * gobj, gpointer data)
       g_signal_emit (cache, cache_signals [OBJECT_REMOVED], 0, gobj);
       g_hash_table_remove (cache->objects, gobj);
     }
-  else
+  else if (g_queue_remove (cache->add_traversal, gobj))
     {
-      g_queue_remove (cache->add_traversal, gobj);
       g_object_unref (gobj);
     }
 }