chore(debian): don't call chown if pid file doesn't exist

packaging/debian/sogo.init

@@ -71,7 +71,7 @@ case "$1" in
 	then
 	    log_progress_msg "already running"
         fi
-	chown root:root $PIDFILE
+	[ -e $PIDFILE ] && chown root:root $PIDFILE
 	log_end_msg 0
 	;;
   stop)
@@ -91,7 +91,7 @@ case "$1" in
         install -o $USER -g adm -m 750 -d /var/spool/$NAME
         install -o $USER -g adm -m 750 -d /var/log/$NAME
 	start-stop-daemon -c $USER --quiet --start --pidfile $PIDFILE --exec $DAEMON -- $DAEMON_OPTS 
-	chown root:root $PIDFILE
+	[ -e $PIDFILE ] && chown root:root $PIDFILE
 	log_end_msg 0
 	;;
   status)