[at-spi2-atk] Collection: Fix an infinite loop when encountering a NULL parent

[Mike Gorse <mgorse src gnome org>]

commit 0d5406c910195ab9869f055d6a5ae8efb333c8a2
Author: Mike Gorse <mgorse suse com>
Date:   Thu Feb 20 10:37:41 2014 -0600

    Collection: Fix an infinite loop when encountering a NULL parent

 atk-adaptor/adaptors/collection-adaptor.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/atk-adaptor/adaptors/collection-adaptor.c b/atk-adaptor/adaptors/collection-adaptor.c
index 11c73d8..af45afc 100644
--- a/atk-adaptor/adaptors/collection-adaptor.c
+++ b/atk-adaptor/adaptors/collection-adaptor.c
@@ -830,7 +830,7 @@ inorder (AtkObject * collection, MatchRulePrivate * mrp,
                                 NULL, TRUE, TRUE);
 
   /* Next, we look through the right subtree */
-  while ((max == 0 || kount < max) && obj != collection)
+  while ((max == 0 || kount < max) && obj && obj != collection)
     {
       AtkObject *parent = atk_object_get_parent (obj);
       i = atk_object_get_index_in_parent (obj);