task_hold_by_id
extern task_t *task_hold_by_id(taskid_t);
if ((tk = task_hold_by_id(id)) != NULL) {
if ((tk = task_hold_by_id(tkid)) == NULL)
if ((tk = task_hold_by_id(tkid)) == NULL)
if ((tk = task_hold_by_id(id)) != NULL) {
if ((tk = task_hold_by_id(id)) == NULL) {