Reset ulog header if iprop load fails

If an iprop slave tries to load a dump from the master and it fails,
reset the ulog header so we take another full dump, instead of
reporting that the slave is current when it isn't.  Reported by
Richard Basch <basch@alum.mit.edu>.

https://github.com/krb5/krb5/commit/b1314b12b12e6cdbe80338010f265ccdaf359e4e
Author: Greg Hudson <ghudson@mit.edu>
Commit: b1314b12b12e6cdbe80338010f265ccdaf359e4e
Branch: master
 src/kadmin/dbutil/dump.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)