[BUG] log: reported queue position was offed-by-one

The reported queue position in the logs was 0 for the first pending request
in the queue, which is wrong because it means that one request will have to
be completed before the queued one may execute. It caused the undesired side
effect that 0/0 was reported when either 0 or 1 request was pending in the
queue. Thus, we have to increment the queue size before reporting the value.
1 file changed