[yelp] [yelp-mallard-document] Don't double-add pages, also fixes #621398

[Shaun McCance <shaunm src gnome org>]

commit 4db5971d569b8c0daffaf491bb4c94d2cb90e4e2
Author: Shaun McCance <shaunm gnome org>
Date:   Sat Jun 26 09:46:06 2010 -0400

    [yelp-mallard-document] Don't double-add pages, also fixes #621398

 libyelp/yelp-mallard-document.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)
---
diff --git a/libyelp/yelp-mallard-document.c b/libyelp/yelp-mallard-document.c
index 1676595..4141782 100644
--- a/libyelp/yelp-mallard-document.c
+++ b/libyelp/yelp-mallard-document.c
@@ -326,7 +326,11 @@ mallard_think (YelpMallardDocument *mallard)
             mallard_page_data_walk (page_data);
             if (page_data->page_id == NULL) {
                 mallard_page_data_free (page_data);
-            } else {
+            }
+            else if (g_hash_table_lookup (priv->pages_hash, page_data->page_id) != NULL) {
+                mallard_page_data_free (page_data);
+            }
+            else {
                 g_mutex_lock (priv->mutex);
                 yelp_document_set_root_id ((YelpDocument *) mallard,
                                            page_data->page_id, "index");
@@ -462,6 +466,8 @@ mallard_page_data_walk (MallardPageData *page_data)
         id = xmlGetProp (page_data->cur, BAD_CAST "id");
         if (id == NULL)
             goto done;
+        if (g_hash_table_lookup (priv->pages_hash, id) != NULL)
+            goto done;
 
         page_data->cache = xmlNewChild (page_data->cache,
                                         priv->cache_ns,