[Ecls-list] Special declaration for .combined-method-args.

[Alexander Gavrilov]

> This is already fixed in a local tree.

It broke the call-next-method closure:

(defgeneric foo (a b)
  (:method ((x function) b)
    (funcall x)))

(defgeneric bar (a b)
  (:method (a b)
    (print (list a b)))
  (:method ((a integer) b)
    (foo #'call-next-method b)))


> (bar 1 2)
(#<compiled-closure 0000000002b73d80> 2)