gcc 4.8: fix warnings

Quiet new warnings introduced by gcc 4.8:

- Many unused typedefs under src/admin.
- A possibly uninitialzed variable under src/viced

Change-Id: I96858c2d12a9ee3270d89a64fcf772affe93e9eb
Reviewed-on: http://gerrit.openafs.org/8913
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Chas Williams - CONTRACTOR <chas@cmf.nrl.navy.mil>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>