block/commit: use QEMU_IOVEC_INIT_BUF
Use new QEMU_IOVEC_INIT_BUF() instead of qemu_iovec_init_external( ... , 1), which simplifies the code. Signed-off-by: NVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: NEric Blake <eblake@redhat.com> Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com> Message-id: 20190218140926.333779-6-vsementsov@virtuozzo.com Message-Id: <20190218140926.333779-6-vsementsov@virtuozzo.com> Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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