obs-transitions: Fix stinger showing count for update during transition

plugins/obs-transitions/transition-stinger.c

@@ -79,6 +79,8 @@ static void stinger_update(void *data, obs_data_t *settings)
 	obs_data_set_bool(media_settings, "is_stinger", true);
 	obs_data_set_bool(media_settings, "is_track_matte", s->track_matte_enabled);
 
+	if (s->media_source && s->transitioning)
+		obs_source_remove_active_child(s->source, s->media_source);
 	obs_source_release(s->media_source);
 	struct dstr name;
 	dstr_init_copy(&name, obs_source_get_name(s->source));
@@ -87,6 +89,8 @@ static void stinger_update(void *data, obs_data_t *settings)
 	dstr_free(&name);
 	obs_data_release(media_settings);
 
+	if (s->media_source && s->transitioning)
+		obs_source_add_active_child(s->source, s->media_source);
 	int64_t point = obs_data_get_int(settings, "transition_point");
 
 	s->transition_point_is_frame = obs_data_get_int(settings, "tp_type") == TIMING_FRAME;
@@ -476,7 +480,7 @@ static bool stinger_audio_render(void *data, uint64_t *ts_out, struct obs_source
 		return false;
 	}
 
-	if (!obs_source_audio_pending(s->media_source)) {
+	if (s->media_source && !obs_source_audio_pending(s->media_source)) {
 		ts = obs_source_get_audio_timestamp(s->media_source);
 		if (!ts)
 			return false;