add another case to flush check

src/switch_rtp.c

@@ -3098,7 +3098,7 @@ static int rtp_common_read(switch_rtp_t *rtp_session, switch_payload_t *payload_
 		if (switch_test_flag(rtp_session, SWITCH_RTP_FLAG_BREAK) || (bytes && bytes == 4 && *((int *) &rtp_session->recv_msg) == UINT_MAX)) {
 			switch_clear_flag_locked(rtp_session, SWITCH_RTP_FLAG_BREAK);
 
-			if (!switch_test_flag(rtp_session, SWITCH_RTP_FLAG_NOBLOCK) || switch_test_flag(rtp_session, SWITCH_RTP_FLAG_PROXY_MEDIA) || switch_test_flag(rtp_session, SWITCH_RTP_FLAG_UDPTL) || (bytes && bytes < 5) || (!bytes && poll_loop)) {
+			if (!switch_test_flag(rtp_session, SWITCH_RTP_FLAG_NOBLOCK) || !switch_test_flag(rtp_session, SWITCH_RTP_FLAG_USE_TIMER) || switch_test_flag(rtp_session, SWITCH_RTP_FLAG_PROXY_MEDIA) || switch_test_flag(rtp_session, SWITCH_RTP_FLAG_UDPTL) || (bytes && bytes < 5) || (!bytes && poll_loop)) {
 				do_2833(rtp_session, session);
 				bytes = 0;
 				return_cng_frame();