KRB: Prevent dereference of a null pointer
Reported by: scan-build
krb5_free_principal(cc->context, ccprinc);
^~
warning: Access to field 'context' results in a dereference of a null pointer
(loaded from variable 'cc')
Variable 'cc' needn't be initialised if function sss_open_ccache_as_user
fails.
Reviewed-by: Sumit Bose <sbose@redhat.com>