libafs: dont handle outstatus on write error

libafs: dont handle outstatus on write error

if a write errored, we can't trust the OutStatus we got. don't.

Reviewed-on: http://gerrit.openafs.org/6714
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@secure-endpoints.com>
Reviewed-by: Alistair Ferguson <alistair.ferguson@mac.com>
Reviewed-by: Derrick Brashear <shadow@dementix.org>
(cherry picked from commit 4c8a3cd789a8495d0c0b3f8ff1a7ebb2a20f5336)

Change-Id: I69b26330aca2e5fd0d2092b579a0fcf1514acb53
Reviewed-on: http://gerrit.openafs.org/7483
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementix.org>