0.7.10.20:

0.7.10.20:
	Fix bug 222 (as per APD sbcl-devel 2002-12-11)
	... define the macro in the correct (restricted) lexical context.
	Fix bug in COERCE [e.g. (COERCE 2 '(SINGLE-FLOAT 3.0 4.0))]
	... when converting to a real type, don't be so lenient if the
		original datum is a rational.
	Define improved DERIVE-TYPE-OPTIMIZER for COERCE
	... for constant RESULT-TYPE arguments, write a branch that
		understands complex canonicalization
	... leave in old branch for ARRAY-ELEMENT-TYPE return types
	Write DERIVE-TYPE-OPTIMIZER for COMPILE
	... (COMPILE NIL <x>) returns an object of type FUNCTION