Fix record_stats definition to accommodate its callers usage!

Fixed the record_stats() definition to comply with its callers! This
patch fixes some incorrect statistics reports (latency and queue wait
time).

Reported-by: Frank Geisenheiner <FGEISEN@de.ibm.com>
Signed-off-by: Malahal Naineni <malahal@us.ibm.com>
Acked-by: Jim Lieb <lieb@sea-troll.net>