Avoid UMRs in dertime.c.  Bugscape bug 54198. r=wtc.
Avoid UMRs in dertime.c.  Bugscape bug 54198. r=wtc.

nmav/nss,nmav/nss,ekr/nss-old,ekr/nss-old,nmav/nss,ekr/nss-old,ekr/nss-old,nmav/nss,ekr/nss-old,ekr/nss-old,nmav/nss,nmav/nss,nmav/nss,ekr/nss-old