0.8.3.45:

0.8.3.45:
	Fix bug 285
	... %MULTIPLY vop was feeling free to scribble over its inputs
	... add :FROM and :TO clauses to try to prevent this
	... %MULTIPLY-AND-ADD vops are unchanged, but could quite easily be
		wrong
	OK, OK, I give in
	... relax the type declaration on signed-immediate instructions
		to allow (unsigned-byte 16)s through