phc2sys: reset sync offset if non PTP timescale

When grandmaster does not use PTP timescale but the previous one did, we
need to reset sync offset and leap flag.

Signed-off-by: Jiri Benc <jbenc@redhat.com>

phc2sys.c

@@ -867,6 +867,9 @@ static int run_pmc_get_utc_offset(struct node *node, int timeout)
 			node->leap = -1;
 		else
 			node->leap = 0;
+	} else {
+		node->sync_offset = 0;
+		node->leap = 0;
 	}
 	msg_put(msg);
 	return 1;