trivial error in mouse-drag-region()

[MIYOSHI Masanori]

The following operation reproduces a trivial error.

(1) Start up emacs with `emacs -q'.
(2) Kill the `*Messages*' buffer.
(3) Click the echo area with the mouse.

As a result the next message is shown in the echo area and the
`*Messages*' buffer is not displayed.
> No buffer named *Messages*

At the same time view-echo-area-messages() doesn't reproduce the
error.

The following patch fixes the problem.

--- mouse.el    14 Oct 2005 13:15:05 -0000      1.282
+++ mouse.el    14 Oct 2005 23:24:20 -0000
@@ -768,7 +768,7 @@
        (save-excursion
          ;; Swallow the up-event.
          (read-event)
-         (set-buffer "*Messages*")
+         (set-buffer (get-buffer-create "*Messages*"))
          (goto-char (point-max))
          (display-buffer (current-buffer)))
       ;; Give temporary modes such as isearch a chance to turn off.

--
MIYOSHI Masanori