Collection: Fix an infinite loop when encountering a NULL parent

diff --git a/atk-adaptor/adaptors/collection-adaptor.c b/atk-adaptor/adaptors/collection-adaptor.c
index 11c73d8..af45afc 100644 (file)
--- 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);