FBSD: fix dumb panic when we can't pfind rxk_Listener
The process is only returned locked if the process is found.
Don't try to unlock it if it's not found.
Reviewed-on: http://gerrit.openafs.org/3186
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>
(cherry picked from commit
832607318b9ad4ab38bb62515cdb4959cc21a656)
Change-Id: Ic4274a4a5640166669714798b909b2efb3b84cdb
Reviewed-on: http://gerrit.openafs.org/3237
Tested-by: BuildBot <buildbot@rampaginggeek.com>