bug#3224: 23.0.92; vc-dir vs uniquify: wrong directory used

[Dan Nicolaescu]

Juanma Barranquero <lekktu@gmail.com> writes:

  > === modified file 'lisp/vc-dir.el'
  > --- lisp/vc-dir.el  2009-12-05 00:24:03 +0000
  > +++ lisp/vc-dir.el  2010-01-06 03:26:33 +0000
  > @@ -101,7 +101,7 @@
  >                        (return buffer))))))))
  >      (or buf
  >          ;; Create a new buffer named BNAME.
  > -        (with-current-buffer (create-file-buffer bname)
  > +        (with-current-buffer (create-file-buffer (expand-file-name bname 
dir))

Please also add a comment explaining why that is done.