0.7.4.22:

0.7.4.22:
	OpenMCL correctly flagged assem.lisp misbehavior by not
		allowing SUBSEQ with END > LENGTH (even when LENGTH =
		FILL-POINTER = less than the physical size of an
		adjustable vector), so tweak VECTOR-SUBSEQ* so that
		SBCL checks this too.
	converting global appalling assem.lisp behavior into
		comparatively local appalling behavior (and
		incidentally fixing the SUBSEQ abuse)...
	...Make rollbacks of CURRENT-INDEX and CURRENT-POSN local
		and temporary instead of global and permanent.
	...(also lots of minor fussing with assem.lisp: trivial
		reformatting, renaming, correcting spelling errors...)
	fixed undefined variable in CHECK-WRAPPER-VALIDITY as per
		APD bug report 176 (but left the rest of the
		reported bug unfixed)