vol_split: Recover from stream open failure

vol_split: Recover from stream open failure

Make sure we go through the error recovery code when we can't create a
stream, instead of just returning without cleaning up.

Reviewed-on: http://gerrit.openafs.org/3466
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>
(cherry picked from commit 94591a635bdd23ba74298c64273d4688405aa370)

Change-Id: Iff1053a2ed1789f2a5047a59b8df4fad94e9062c
Reviewed-on: http://gerrit.openafs.org/3792
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementia.org>