viced: fix missing host lock in h_Enumerate

viced: fix missing host lock in h_Enumerate

The global host lock must be held over h_Release_r. Fix the
the case in h_Enumerate where h_Release_r is called without
the global host lock held.

Reviewed-on: http://gerrit.openafs.org/3294
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
(cherry picked from commit c8dc68299d47ae4d7f0c9a1354de9ddd37ff86fc)

Change-Id: I10ac0ce495f2784ec270ebb50fc92c983cc0308b
Reviewed-on: http://gerrit.openafs.org/3295
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>