loop: fix bad bio_alloc() nr_iovec request
authorJens Axboe <jens.axboe@oracle.com>
Fri, 11 Jan 2008 09:14:40 +0000 (10:14 +0100)
committerJens Axboe <jens.axboe@oracle.com>
Fri, 11 Jan 2008 09:14:40 +0000 (10:14 +0100)
Don't allocate room for an iovec when it is not needed.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

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