bug#10200: 24.0.92; Message buffer pops up in new window

[martin rudalics]

> In Emacs 23, message-mode relied on same-window-buffer-names to remain
> on the same window.  That's nil, now so you can't just call
> pop-to-buffer there.  I've checked in a fix.

IMHO all former same-window-buffer-names/-regexps guarded calls of
`display-buffer' should use `pop-to-buffer-same-window' now.

martin