The find_living efun finds the first living object that has the id
'name'. A living object is an object that has done enable_commands,
that is per default all players and monsters.
The object must have set a name with set_living_name. There is a
special hash table that speeds up the search for living objects, so
if you know that an object is living, use find_living rather than
find_object. If you know that the object is a player, use find_player,
which is even faster.
Return value:
If the living is found, its object pointer is returned, else 0.
