Set msg_type when decoding FAST requests

An RFC 6113 KrbFastReq contains a padata sequence and a KDC-REQ-BODY,
neither of which contain the msg-type field found in a KDC-REQ.  So
when we decode the FAST request, the resulting krb5_kdc_req structure
has a msg_type of 0.  Copy msg_type from the outer body, since we make
use of it in further KDC processing.

(cherry picked from commit 3a447c5a8c95758501cf5a20c161a2d735a02f6d)

https://github.com/krb5/krb5/commit/8a7729d8b425fa9a58483861dd8701f0db6a4a10
Author: Greg Hudson <ghudson@mit.edu>
Committer: Tom Yu <tlyu@mit.edu>
Commit: 8a7729d8b425fa9a58483861dd8701f0db6a4a10
Branch: krb5-1.11
 src/kdc/fast_util.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)