logrotate error on rotating winbind

I frequently get the following error from logrotate on some of my 12.04 LTS machines.

 /etc/cron.daily/logrotate:
 logrotate_script: line 1: kill: (1660) - No such process
 error: error running non-shared postrotate script for /var/log/samba/log.winbindd of '/var/log/samba/log.winbindd '
 run-parts: /etc/cron.daily/logrotate exited with return code 1

/etc/logrotate.d/winbind has the default content shown below.
The kill command returns an error if for whatever reason the PID listed in /var/run/samba/winbindd.pid is not running.

Thus the kill line should be improved to something like
  [ -f /var/run/samba/winbind.pid ] && { PID=$(cat /var/run/samba/winbindd.pid) ; ps -p $PID | grep -q $PID && kill -HUP $PID ; }

/var/log/samba/log.winbindd {
        weekly
        missingok
        rotate 7
        postrotate
        [ ! -f /var/run/samba/winbindd.pid ] || kill -HUP `cat /var/run/samba/winbindd.pid`
        endscript
        compress
        notifempty
}