bug#1414: 23.0.60; Middle mouse button does not work in Cocoa port

[Wolfgang Lux]

Please write in English if possible, because the Emacs maintainers
usually do not have translators to read other languages for them.

Your bug report will be posted to the emacs-pretest-bug@gnu.org  
mailing list.

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

Clicking the middle mouse button does not have an effect. The attached
patch fixes this issue.

In GNU Emacs 23.0.60.1 (powerpc-apple-darwin8.11.0, NS apple- 
appkit-824.48)
 of 2008-11-21 on Onyx.local
Windowing system distributor `Apple', version  
97.112.112.108.101.45.97.112.112.107.105.116.45.56.50.52.46.52.56
configured using `configure  '--with-ns''

nsterm.patch
Description: Binary data