viced: Don't VTakeOffline_r without glock

viced: Don't VTakeOffline_r without glock

We don't have the volume glock, so don't call _r functions.

Reviewed-on: http://gerrit.openafs.org/4669
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
(cherry picked from commit ef0ac2fbb026385f2306189230c2cff8706dff06)

Change-Id: I3d7c2ca8a514d50c01d4830640e806cefac32af1
Reviewed-on: http://gerrit.openafs.org/6299
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementix.org>