Improve klist check for expired cache

Make klist -s succeed for a cache which contains a non-expired
credential and no TGT cred.

https://github.com/krb5/krb5/commit/922f627b28f480eafc240fb4706cacf6aa7f4c14
Author: Greg Hudson <ghudson@mit.edu>
Commit: 922f627b28f480eafc240fb4706cacf6aa7f4c14
Branch: master
 src/clients/klist/klist.c |   21 ++++++++++++++++-----
 1 files changed, 16 insertions(+), 5 deletions(-)