bug#690: 23.0.60; Function origin file misremembered

[Markus Triska <markus.triska@gmx.at>]

Let ~/prolog.el consist of the forms:

   (defun prolog-mode ()
     (interactive)
     (message "hi"))

   (provide 'prolog)

When I do "$ emacs -Q" and evaluate:

   (progn
     (add-to-list 'load-path "~/")
     (autoload 'prolog-mode "prolog" "Prolog mode" t)
     (prolog-mode))

the message "hi" is displayed, like every further time I evaluate
(prolog-mode). "C-h f prolog-mode RET" shows:

   prolog-mode is a Lisp function in `prolog.el'.

When I follow the link (`prolog.el'), it leads me to the wrong file,
namely ~/emacs/lisp/progmodes/prolog.el, i.e., part of Emacs source.


In GNU Emacs 23.0.60.1 (i386-apple-darwin8.11.1, GTK+ Version 2.12.9)
 of 2008-08-08 on pnsgw1-client079.demo.tuwien.ac.at
Windowing system distributor `The XFree86 Project, Inc', version 11.0.40400000
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t