0.9.1.28:

0.9.1.28:
	MORE PRETTY:

	* "Oops". Change the definition of the recenctly introduced
          WITH-CIRCULARITY-DETECTION macro to only include BODY once.
          Otherwise code with nested PPRINT-LOGICAL-BLOCKs would
          expand into ridiculous amounts of code. (The macroexpansion
          of PPRINT-LAMBDA-LIST was >18000 lines).
        * Return NIL from PPRINT-POP when OBJECT is NIL.
	* Check for malformed LABELS/FLET/MACROLET forms in PPRINT-FLET.

        Other stuff:

        * Declare a more specific type for *CHARACTER-DATABASE* to
          avoid going through HAIRY-DATA-VECTOR-REF. (thanks to
          Christophe for noticing this)
        * Add missing type predicate for VECTOR-NIL-P. (MISC.596)