s3: libsmbclient: After getting attribute server, ensure main srv pointer is still valid.
Bug #11186: Crash seen in libsmbclient due to free of server structure during SMBC_getxattr() call
Bug: https://bugzilla.samba.org/show_bug.cgi?id=11186
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Autobuild-User(master): David Disseldorp <ddiss@samba.org>
Autobuild-Date(master): Tue Apr 14 02:58:43 CEST 2015 on sn-devel-104
(cherry picked from commit
2d4db4a65e1e8924470741378fe249f22196eceb)