Add a comment about possibly dangerous behaviour.

git-svn-id: https://svn.erp5.org/repos/neo/trunk@2148 71dcc9de-d417-0410-9af5-da40c76e7ee4

neo/master/transactions.py

@@ -90,6 +90,8 @@ class Transaction(object):
             Define that a node has locked the transaction
             Returns true if all nodes are locked
         """
+        # XXX: Should first check that node is part of transaction, and fail if
+        # it's not.
         self._uuid_dict[uuid] = True
         return self.locked()