Windows: cm_MergeStatus unknown interface numbers

Windows: cm_MergeStatus unknown interface numbers

Ignore status information if the interface number is unknown.
Currently only version 1 is recognized.

Reviewed-on: http://gerrit.openafs.org/7743
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Tested-by: Jeffrey Altman <jaltman@your-file-system.com>
(cherry picked from commit 8115841e2fc9d827a7207ddc18e5c84e466ed7e7)

Change-Id: Iaa3eb3aae931ee65c991e2786d80a9a62eff76c6
Reviewed-on: http://gerrit.openafs.org/8641
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>