vldb_check: off by one host address table error

vldb_check: off by one host address table error

Fix several off-by-one errors when traversing the IpMappedAddr
table in vldb_check. The last index (254) was not checked
in several places.

Reviewed-on: http://gerrit.openafs.org/7614
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementix.org>
(cherry picked from commit a27a8a66c2c27a62afa566679ef9cf424e758d9f)

Change-Id: I5fd5b452cafe641765247bdf11ef1a1b08cc1529
Reviewed-on: http://gerrit.openafs.org/8209
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>