bug#7693: 24.0.50, 23.2.91; advice to kill-new causes warning

[Katsumi Yamaoka]

Maybe it's harmless but surprises me a bit.

(require 'bytecomp)
(defadvice kill-new (before nop activate))

This causes a warning in the "*Compile-Log*" buffer as follows:

Warning: ad-Orig-kill-new called with 3 arguments, but accepts only 1-2

It is because the arglist of `kill-new' is still
(string &optional replace yank-handler), that `advice' recognizes
by using `symbol-function'.  Any idea?

;; Emacs-w3m advises `kill-new' for some reason.