[orca] Another sanity check to better cope with vanishing accessible objects.

[Joanmarie Diggs <joanied src gnome org>]

commit 52848b9d9b033450215bbb39e6c98d12d7a6e43b
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Sat Dec 17 14:54:59 2011 -0500

    Another sanity check to better cope with vanishing accessible objects.

 src/orca/scripts/default.py |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/src/orca/scripts/default.py b/src/orca/scripts/default.py
index c75f2f4..86bb95c 100644
--- a/src/orca/scripts/default.py
+++ b/src/orca/scripts/default.py
@@ -1368,7 +1368,10 @@ class Script(script.Script):
         # If this object is CONTROLLED_BY the object that currently
         # has focus, speak/braille this object.
         #
-        relations = obj.getRelationSet()
+        try:
+            relations = obj.getRelationSet()
+        except LookupError:
+            relations = []
         for relation in relations:
             if relation.getRelationType() \
                    == pyatspi.RELATION_CONTROLLED_BY: