MT#55283 lock payload tracker

Change-Id: I22ef38f4b32ec6a710c7120378080d95dfa00b60
Warned-by: Coverity

daemon/codec.c

@@ -3932,6 +3932,8 @@ static void __dtx_send_later(struct codec_timer *ct) {
 		else {
 			shutdown = true; // default if no last used PTs are known
 
+			LOCK(&se->tracker.lock);
+
 			for (int i = 0; i < G_N_ELEMENTS(se->tracker.last_pts); i++) {
 				int pt_idx = se->tracker.last_pt_idx - i;
 				pt_idx += G_N_ELEMENTS(se->tracker.last_pts);

daemon/ssrc.c

@@ -651,7 +651,7 @@ void payload_tracker_add(struct payload_tracker *t, int pt) {
 	if (G_UNLIKELY(pt < 0) || G_UNLIKELY(pt >= 128))
 		return;
 
-	mutex_lock(&t->lock);
+	LOCK(&t->lock);
 
 	int pt_idx = (t->last_pt_idx + 1) % G_N_ELEMENTS(t->last_pts);
 	t->last_pts[pt_idx] = pt;
@@ -698,7 +698,6 @@ void payload_tracker_add(struct payload_tracker *t, int pt) {
 out:
 	if (++t->last_idx >= G_N_ELEMENTS(t->last))
 		t->last_idx = 0;
-	mutex_unlock(&t->lock);
 }