s3-libsmb: Initialise ticket to ensure we do not invalid memory

s3-libsmb: Initialise ticket to ensure we do not invalid memory

The free is however a talloc_free(), which has additional protection against
freeing the wrong thing.

Andrew Bartlett

Signed-off-by: Jeremy Allison <jra@samba.org>
Autobuild-User: Jeremy Allison <jra@samba.org>
Autobuild-Date: Fri Mar  2 01:45:19 CET 2012 on sn-devel-104
(cherry picked from commit f1452a296429b79755235f4a480f0d5ea38ce178)

Fix bug #8788 - spnego_parse_krb5_wrap() frees invalid memory.
(cherry picked from commit e96f50c9bb145a6af2c023e8ff4c3e8888c5a4a6)