Small checkstyle fix.

Change-Id: I3b6e8613489c3d0b3dc969336121dcbb3e178531
Reviewed-on: http://review.couchbase.org/24405
Reviewed-by: Michael Nitschinger <michael.nitschinger@couchbase.com>
Tested-by: Michael Nitschinger <michael.nitschinger@couchbase.com>