bug#1237: 23.0.60; `switch-to-buffer-other-window' sometimes uses selected window

[Markus Triska]

When you do:

   $ emacs -Q -f linum-mode

and then:

   C-x 2

you obtain one frame with two windows, the one on top being selected.

When you then do:

   M-: (switch-to-buffer-other-window "test") RET

the selected window is unexpectedly reused to display the new buffer.

In GNU Emacs 23.0.60.11 (i386-apple-darwin8.11.1, GTK+ Version 2.12.9)
 of 2008-10-14 on mt-computer.local
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_GB.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t