+
+ if ((when > 0) && most_recent_insert_iterator != _events.begin ()) {
+ --most_recent_insert_iterator;
+ double last_when = (*most_recent_insert_iterator)->when;
+ ++most_recent_insert_iterator;
+ if (when - last_when > 64) {
+ add_guard_point (when - 64);
+ }
+ }
+