longlines and global-auto-revert-mode

[Dmitry Bolshakov]

Hi All.

My system:
WinXP
GNU Emacs 22.1.1 (i386-mingw-nt5.1.2600) of 2007-06-02 on RELEASE

In order to be informed that file has been modified externally, I have 
added this in my .emacs:
(global-auto-revert-mode 1)
(defun inform-revert-modified-file (&optional p1 p2)
 (let ((revert-buffer-function nil))
   (revert-buffer p1 p2)
   (message-box "emacs: modified file automatically reverted: %s" 
(buffer-file-name))
 )
)
(setq revert-buffer-function 'inform-revert-modified-file)

It works fine, but if longlines-mode is active, then when file is been 
modified by external program, I get not only my message, but before it I 
get question in minibuffer "filename.txt changed on disk; really edit 
the buffer? (y, n, r or C-h)". Why? I want only my message. How to 
disable this question?

--
With best regards
Dmitry Bolshakov