bug#685: 23.0.60; ediff-revision does not work with bazaar

[Chong Yidong]

> Starting from
>   emacs -Q
> and opening a file under bazaar version control and then doing
>   M-x ediff-revision
> I get the backtrace below.
>
> Debugger entered--Lisp error: (wrong-number-of-arguments #[(file 
> &optional editable rev) "..." [rev error "Operation not supported"] 2]
> 4)
>   vc-bzr-checkout("c:/EmacsW32/nxhtml/nxhtml/doc/nxhtml-changes.html" 

Do you still see this bug?  I can't reproduce it now.