bug#1357: 23.0.60; Mouse button 2 is not recognized (on Mac; --with-ns)

[Harald Hanche-Olsen]

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

Pressing mouse button 2 produces no response in any buffer. C-h c
<button 2> does nothing (until I press some other key or mouse button,
in which case the binding of that key is described). Buttons 1 and 3
work fine, as does the scroll wheel.

In GNU Emacs 23.0.60.1 (powerpc-apple-darwin9.5.0, NS apple-appkit-949.35)
 of 2008-11-14 on macknife
Windowing system distributor `Apple', version 
97.112.112.108.101.45.97.112.112.107.105.116.45.57.52.57.46.51.53
configured using `configure  '--with-ns' '--without-x''

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: nil
  value of $XMODIFIERS: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Major mode: Completion List

Minor modes in effect:
  diff-auto-refine-mode: t
  show-paren-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
C-h c <down-mouse-1> <down-mouse-3> <mouse-3> <mouse-1> 
C-g C-x b * M e s <tab> <return> M-x b u r <tab> <return> 
C-a C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n q M-x M-p 
M-p <return>

Recent messages:
Wrote /Users/hanche/lib/emacs/.emacs
C-g runs the command keyboard-quit
You did not specify a variable
Quit
Making completion list... [2 times]
Quit [2 times]
Mark set
Making completion list...
Quit
<down-mouse-1> at that spot runs the command mouse-drag-region
Quit