Don't return a "None" string at the end of the URL

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@8704 20353a03-c40f-0410-a6d1-a30d3c3de9de

bt5/erp5_web/SkinTemplateItem/portal_skins/erp5_web/WebSite_getDocumentUrl.xml

@@ -71,7 +71,11 @@
             <value> <string>#XXX This script should be named WebSite_getDocument\n
 document = context.WebSite_getDocumentValue()\n
 if document is not None:\n
-  return \'%s/%s\' % (context.WebSite_getSection(),document.getReference())\n
+  doc_url = context.WebSite_getSection()\n
+  doc_ref = document.getReference()\n
+  if doc_ref is not None:\n
+    doc_url += \'/%s\' % doc_ref\n
+  return doc_url\n
 return context.WebSite_getUrl()\n
 </string> </value>
         </item>
@@ -116,9 +120,11 @@ return context.WebSite_getUrl()\n
                         <value>
                           <tuple>
                             <string>_getattr_</string>
-<string>context</string>
+                            <string>context</string>
                             <string>document</string>
                             <string>None</string>
+                            <string>doc_url</string>
+                            <string>doc_ref</string>
                           </tuple>
                         </value>
                     </item>