viced: lockcount only valid if not expired

viced: lockcount only valid if not expired

locks are issued on a lease.  If the lock is expired, the lock
count is zero.

Reviewed-on: http://gerrit.openafs.org/6740
Reviewed-by: Derrick Brashear <shadow@dementix.org>
Reviewed-by: Alistair Ferguson <alistair.ferguson@mac.com>
Reviewed-by: Jeffrey Altman <jaltman@secure-endpoints.com>
Tested-by: Jeffrey Altman <jaltman@secure-endpoints.com>
(cherry picked from commit 4603057d99a1501275f14f6d5aba089364785e09)

Change-Id: I784bdccae6d5fb01c76590ccd34fb9efa417747e
Reviewed-on: http://gerrit.openafs.org/6750
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementix.org>