Guarda el wait time en el queue_log cuando el evento es EXITWITHTIMEOUT.
apps/app_queue.c
Cambia las variables de la función ast_queue_log:
ast_queue_log(args.queuename, chan->uniqueid, "NONE", "EXITWITHTIMEOUT", "%d", qe.pos); ast_queue_log(args.queuename, chan->uniqueid, "NONE", "EXITWITHTIMEOUT", "%d|%ld", qe.pos,(long) (time(NULL) - qe.start));