Method setId

src/Savegame/AlienMission.cpp:569–573

* Assigns a unique ID to this mission. * It is an error to assign two IDs to the same mission. * @param id The UD to assign. */

 * @param id The UD to assign.
 */
void AlienMission::setId(int id)
{
	assert(_uniqueID == 0 && "Reassigning ID!");
	_uniqueID = id;
}

/**
 * @return The unique ID assigned to this mission.