It's useful to know which structured reply chunk is being processed.
Missed in commit d2febedb.
Signed-off-by: NEric Blake <eblake@redhat.com>
Message-Id: <20171108215703.9295-4-eblake@redhat.com>
Reviewed-by: NVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>