Unix CM: Fix stray semicolon

Commit d2437d02a6f59d972dd0690f7eb1c46cf7cc4b85 introduced a
stray semicolon in the osidnlc code. Fix it.

Caught by coverity (#989030)

Change-Id: I1f68b6149bb4325995c96d8599c45565c4979f16
Reviewed-on: http://gerrit.openafs.org/9321
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>