bug#8207: 24.0.50; undo in indirect buffer leaves stale file lock symlink

[Chong Yidong <cyd@gnu.org>]

Stephen Berman <stephen.berman@gmx.net> writes:

> 1. emacs -Q
> 2. Visit some file, e.g. "foo".
> 3. M-: (switch-to-buffer (make-indirect-buffer (current-buffer) "bar"))
> 4. In the indirect buffer "bar" do something to modify the buffer,
>    e.g. type SPC.  This causes a file lock symlink like the following to
>    be added to the directory containing "foo":
>    .#foo -> steve@escher.fritz.box.800:1299574078
> 5. Type `C-_' to undo the change in step 4, so that "bar" is now
>    unmodified, and then kill "bar".
> => The file lock symlink in foo's directory is still there.  

Fixed in trunk, thanks.