[PATCH] xfstests: fix error discard test output in 251.out.

[Alex Elder]

On Thu, 2011-04-28 at 11:49 +0800, Tao Ma wrote:
> From: Tao Ma <boyu.mt at taobao.com>
> 
> I don't know why, but discard tests is 251 in xfs,
> but 251.out has number of 248 in it, So it fails.
> Change it to 251 now.
> 
> Cc: Lukas Czerner <lczerner at redhat.com>
> Cc: Christoph Hellwig <hch at lst.de>
> Cc: Alex Elder <aelder at sgi.com>
> Signed-off-by: Tao Ma <boyu.mt at taobao.com>

Looks good.  I'll commit this for you.

Reviewed-by: Alex Elder <aelder at sgi.com>