Fix SPAKE memory leak

In the NIST group implementations, ossl_fini() needs to free the
groupdata container as well as its fields.  Also in
spake_kdc.c:parse_data(), initialize the magic field of the resulting
data object to avoid a harmless uninitialized memory copy.

https://github.com/krb5/krb5/commit/91dad4eba37b5b56dc21d59880cb6eb4d3e6b7a5
Author: Greg Hudson <ghudson@mit.edu>
Commit: 91dad4eba37b5b56dc21d59880cb6eb4d3e6b7a5
Branch: master
 src/plugins/preauth/spake/openssl.c   |    1 +
 src/plugins/preauth/spake/spake_kdc.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)