From 82e53778a62c15adc121e859d00093aaf0f3c3cc Mon Sep 17 00:00:00 2001
From: Georg Brandl <georg@python.org>
Date: Thu, 14 Jan 2010 19:53:00 +0100
Subject: [PATCH] Fix duplication of source links.

---
 sphinx/ext/viewcode.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sphinx/ext/viewcode.py b/sphinx/ext/viewcode.py
index 7f9df2da9..5aa87069c 100644
--- a/sphinx/ext/viewcode.py
+++ b/sphinx/ext/viewcode.py
@@ -43,7 +43,9 @@ def doctree_read(app, doctree):
         if objnode['domain'] != 'py':
             continue
         names = set()
-        for signode in objnode.traverse(addnodes.desc_signature):
+        for signode in objnode:
+            if not isinstance(signode, addnodes.desc_signature):
+                continue
             modname = signode['module']
             if not modname:
                 continue