Fix dirty bug

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@15797 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5SyncML/Subscription.py

@@ -495,7 +495,7 @@ class Signature(Folder, SyncCode):
     if type(xml) is type(u'a'):
       xml = xml.encode('utf-8')
     if xml is not None:
-      xml = self.xml.replace('@-@@-@','--') # need to put back '--'
+      xml = xml.replace('@-@@-@','--') # need to put back '--'
     self.partial_xml = xml
 
   def getPartialXML(self):