Move gil_scoped_release in schedule_sync after the event is created

Fixes nb::incref_checked check in debug builds

Author: artfwo

src/aalink.cpp

@@ -108,9 +108,6 @@ struct Scheduler {
     }
 
     void schedule_sync(nb::object future, double beat, double offset, double origin) {
-        // prevent occasional GIL deadlocks when calling link.sync()
-        nb::gil_scoped_release release;
-
         SchedulerSyncEvent event = {
             .future = future,
             .beat = beat,
@@ -119,6 +116,9 @@ struct Scheduler {
             .link_beat = next_link_beat(m_link_beat, beat, offset, origin),
         };
 
+        // prevent occasional GIL deadlocks when calling link.sync()
+        nb::gil_scoped_release release;
+
         m_events_mutex.lock();
         m_events.push_back(std::move(event));
         m_events_mutex.unlock();