rem: dprintf("set_port_owner: invalid port_id %d\n", id);
add: dprintf("set_port_owner: invalid port_id %ld\n", id);
context: set_port_owner(port_id id, team_id team){	int slot;	int state;		if(ports_active == false)		return B_BAD_PORT_ID;	if(id < 0)		return B_BAD_PORT_ID;	slot = id % MAX_PORTS;	state = disable_interrupts();	GRAB_PORT_LOCK(ports[slot]);	if(ports[slot].id != id) {		RELEASE_PORT_LOCK(ports[slot]);		restore_interrupts(state);		dprintf("set_port_owner: invalid port_id %d\n", id);		return B_BAD_PORT_ID;	}	// transfer ownership to other team	ports[slot].owner = team;	// unlock port	RELEASE_PORT_LOCK(ports[slot]);	restore_interrupts(state);	return B_NO_ERROR;}