Windows: AFSNameArrayClone leak in AFSCommonCreate

Do not leak the AFSNameArrayClone if AFSLocateName fails.

Change-Id: I01ea5ac7261de2cd2e715e7d110cb5e09173938c
Reviewed-on: http://gerrit.openafs.org/9922
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>