The __undoLog() method is used by undoLog() and transactionLog() with
different parameters. When a recursive call is made, keep initial arguments
instead of always call as if it was undoLog().

git-svn-id: https://svn.erp5.org/repos/neo/trunk@1867 71dcc9de-d417-0410-9af5-da40c76e7ee4