Make sure that a base object has an appropriate method.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@4418 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Extensions/Grep.py

 import re
 import cgi
+from Acquisition import aq_base
 
 def traverse(ob, r, result):
-  if hasattr(ob, 'objectValues'):
+  if hasattr(aq_base(ob), 'objectValues'):
     for sub in ob.objectValues():
       traverse(sub, r, result)
   try:
+    if hasattr(aq_base(ob), 'manage_FTPget'):
       text = ob.manage_FTPget()
+    else:
+      text = None
   except:
     text = None
   if text: