block/nbd-client: fix nbd_reply_chunk_iter_receive

Use exported report, not the variable to be reused (should not really
matter).
Signed-off-by: NVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Message-Id: <20190201130138.94525-5-vsementsov@virtuozzo.com>
Signed-off-by: NEric Blake <eblake@redhat.com>

block/nbd-client.c

@@ -602,7 +602,7 @@ static bool nbd_reply_chunk_iter_receive(NBDClientSession *s,
     }
 
     /* Do not execute the body of NBD_FOREACH_REPLY_CHUNK for simple reply. */
-    if (nbd_reply_is_simple(&s->reply) || s->quit) {
+    if (nbd_reply_is_simple(reply) || s->quit) {
         goto break_loop;
     }