snd_seq_prioq_leave
void snd_seq_prioq_leave(struct snd_seq_prioq *f, int client, int timestamp);
snd_seq_prioq_leave(q->tickq, client, 0);
snd_seq_prioq_leave(q->timeq, client, 0);
snd_seq_prioq_leave(q->tickq, ev->source.client, 1);
snd_seq_prioq_leave(q->timeq, ev->source.client, 1);