make sure to commit signature without acquisition wrappers

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@13722 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5SyncML/Subscription.py

@@ -1060,7 +1060,7 @@ class Subscription(Folder, SyncCode):
     """
     if signature.getGid() in self.objectIds():
       self._delObject(signature.getGid())
-    self._setObject( signature.getGid(), signature )
+    self._setObject( signature.getGid(), aq_base(signature) )
 
   def delSignature(self, gid):
     """