0.7.4.24:

0.7.4.24:
	Fix bug 177 (bogus type warnings from CALL-NEXT-METHOD) with
		a hack, wrapping the offending code in an opaque
		identity function.
	Add comments in INVOKE-EFFECTIVE-METHOD-FUNCTION
		explaining CSR's insight that the ,@(WHEN ...)
		clauses are optimizing slot access (with slots
		encoded as FIXNUMs). Also remove DECLARE
		NOTINLINE GET-SLOTS-OR-NIL now that I understand
		what the code is doing.