UPDATE-OBJECTS-JOINS — Updates joined slots of objects.
Function
objectsA list of instances of a View Class.
slots
              A list of slot names in object or T. 
            
force-p
              A Boolean, defaulting to T. 
	    
class-nameA list of instances of a View Class.
max-len
              A non-negative integer or NIL defaulting to
              *default-update-objects-max-len*.
	    
Updates from the records of the appropriate database
      tables the join slots specified by slots
      in the supplied list of View
      Class instances
      objects. slots
      when T means that all join slots with
      :retrieval :immediate are
      updated. class-name is used to specify
      the View Class of
      all instance in objects, when NIL then
      the class of the first instance in
      objects is
      used. force-p when T means that all
      join slots are updated whereas a value of NIL means that only
      unbound join slots are updated. max-len
      when non-nil specifies that
      update-object-joins may issue multiple
      database queries with a maximum of
      max-len instances updated in each query.
      
(defvar *addresses* (select 'deferred-employee-address :order-by [ea_join aaddressid] :flatp t))
=> *ADDRESSES*
(slot-boundp (car *addresses*) 'address)
=> NIL
(update-objects-joins *addresses*)
=> 
(slot-boundp (car *addresses*) 'address)
=> T
(slot-value (car *addresses*) 'address)
=> #<ADDRESS {480B0F1D}>