t_prf.c:  Ensure prfsz is set before use (not exercised in current tests)

t_short.c: Fix memory leak



https://github.com/krb5/krb5/commit/7981e0a3657d2573dde10fb9cca194ceabd23d4a
Commit By: epeisach
Revision: 24287
Changed Files:
U   trunk/src/lib/crypto/crypto_tests/t_prf.c
U   trunk/src/lib/crypto/crypto_tests/t_short.c