bug#11261: 24.1.50; cursor doesn't move in a long line

[Eli Zaretskii]

> Date: Tue, 17 Apr 2012 08:40:40 +0900
> From: Katsumi Yamaoka <yamaoka@jpl.org>
> 
> (let ((fox "The quick brown fox jumps over the lazy dog."))
>   (pop-to-buffer "*testing*")
>   (erase-buffer)
>   (setq header-line-format fox)
>   (dotimes (var 1000)
>     (insert fox "  "))
>   (goto-char (point-min))
>   (search-forward "fox" nil t 500))
> 
> Could this be fixed?

This is a clear regression, so I will look into it ASAP.

Thanks.