[PATCH] fix failure to load checkdoc after r110630

[Nix]

I haven't looked for other instances of this.

=== modified file 'lisp/emacs-lisp/checkdoc.el'
--- lisp/emacs-lisp/checkdoc.el 2012-10-23 15:06:07 +0000
+++ lisp/emacs-lisp/checkdoc.el 2012-10-23 15:35:03 +0000
@@ -286,7 +286,7 @@
 location of end of the documentation string.")
 
 (define-obsolete-variable-alias 'checkdoc-comment-style-hooks
-  checkdoc-comment-style-functions "24.3")
+  'checkdoc-comment-style-functions "24.3")
 (defvar checkdoc-comment-style-functions nil
   "Hook run after the standard comment style check is completed.
 Must return nil if no errors are found, or a string describing the