Re: Issue 756 in robotframework: Using `--xunitfile` and `--listener` together throws non-fatal exception

[robotframework]

Updates:
	Summary: Using `--xunitfile` and `--listener` together throws non-fatal  
exception
        Labels: Target-2.5.6
Comment #1 on issue 756 by pekka.klarck: Using `--xunitfile` and  
`--listener` together throws non-fatal exception
http://code.google.com/p/robotframework/issues/detail?id=756

We apparently forgot to add xunit_file method into the listener API when we  
added the new xunit output (issue 442) in RF 2.5.5. Needs to be added in  
the next release be it 2.5.6 or 2.6.