Expand kadmin protocol kvno range

Make xdr_krb5_kvno() use xdr_u_int() instead of xdr_u_char(), allowing
it to marshal kvno values up to 32 bits.  This change is
backwards-compatible because XDR uses four bytes to marshal char
values and does no bounds checking of char values on decode.

https://github.com/krb5/krb5/commit/49b2c5e30edf980e0f99b5fe2cdf6ff5b2a8b032
Author: Greg Hudson <ghudson@mit.edu>
Commit: 49b2c5e30edf980e0f99b5fe2cdf6ff5b2a8b032
Branch: master
 src/lib/kadm5/kadm_rpc_xdr.c |   15 +--------------
 1 files changed, 1 insertions(+), 14 deletions(-)