0.9.16.40:

0.9.16.40:
	Don't do permutation vector optimization for SLOT-VALUE on method
        parameters that are SETQd [see the test ((:setq :method-parameter)
        slot-value) in clos.impure.lisp].

        * WALK-METHOD-LAMBDA detects parameters whose bindings are modified,
          and returns them as a list
        * MAKE-METHOD-LAMBDA-INTERNAL adds a symbol-macrolet
          %PARAMETER-BINDING-MODIFIED with that list as a value around
          the method body
        * OPTIMIZED-SLOT-VALUE and friends no longer directly return the
          optimized form when the method is being walked, but a macro
          that expands to either the optimized or unoptimized form, based
          on %PARAMETER-BINDING-MODIFIED
        * As a side effect, SETQ-P becomes a little more accurate