Continues the stopped queue q by sending a SND_SEQ_EVENT_CONTINUE event to timer port. This function invokes snd_seq_control_queue internally. This doesn't reset the time position unlike snd_seq_start_queue.
If ev argument is NULL, a temporary event record is used and delivered immediately. Otherwise, the given event record is used and its flags are evaluated.
Function returns zero if successful, or a negative error code.