Windows: do not leak space allocation

Windows: do not leak space allocation

smb_ReceiveNTTranCreate leaks a cm_GetSpace allocation on
error.  Don't do that.

Reviewed-on: http://gerrit.openafs.org/5062
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>
Tested-by: Jeffrey Altman <jaltman@openafs.org>
(cherry picked from c61f5208f553ed1674d1ae51d6e0f16fcdbba47b)

Change-Id: Id706189bd0aafb0b55c58f28fff80ba841a8ef48
Reviewed-on: http://gerrit.openafs.org/5135
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>
Tested-by: Jeffrey Altman <jaltman@openafs.org>