[orca] Fix for bug 673757 - Pages with alt attribute present but not actually set results in traceback in w

[Joanmarie Diggs <joanied src gnome org>]

commit 01fbfde90f677bf0a8ab64c7e2a4340b9714773d
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Mon Apr 9 12:42:48 2012 -0400

    Fix for bug 673757 - Pages with alt attribute present but not actually set results in traceback in webkitgtk content

 .../scripts/toolkits/WebKitGtk/script_utilities.py |    9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)
---
diff --git a/src/orca/scripts/toolkits/WebKitGtk/script_utilities.py b/src/orca/scripts/toolkits/WebKitGtk/script_utilities.py
index 195d22d..151fc76 100644
--- a/src/orca/scripts/toolkits/WebKitGtk/script_utilities.py
+++ b/src/orca/scripts/toolkits/WebKitGtk/script_utilities.py
@@ -1,7 +1,7 @@
 # Orca
 #
 # Copyright (C) 2010 Joanmarie Diggs
-# Copyright (C) 2011 Igalia, S.L.
+# Copyright (C) 2011-2012 Igalia, S.L.
 #
 # Author: Joanmarie Diggs <jdiggs igalia com>
 #
@@ -24,7 +24,7 @@ __id__ = "$Id$"
 __version__   = "$Revision$"
 __date__      = "$Date$"
 __copyright__ = "Copyright (c) 2010 Joanmarie Diggs." \
-                "Copyright (c) 2011 Igalia, S.L."
+                "Copyright (c) 2011-2012 Igalia, S.L."
 __license__   = "LGPL"
 
 import pyatspi
@@ -151,7 +151,10 @@ class Utilities(script_utilities.Utilities):
         offsets = filter(lambda x: start <= x < end, offsets)
 
         objects = []
-        objs = [obj[htext.getLinkIndex(offset)] for offset in offsets]
+        try:
+            objs = [obj[htext.getLinkIndex(offset)] for offset in offsets]
+        except:
+            objs = []
         ranges = [self.getHyperlinkRange(x) for x in objs]
         for i, (first, last) in enumerate(ranges):
             objects.append((obj, start, first, string[start:first]))