0.8.21.30:

        * Fix misc.548: weakening of (VALUES (MEMBER A B C) &OPTIONAL)
          produces (VALUES &OPTIONAL SYMBOL) with different number of
          required/optional parameters.
        * Fix DATA-VECTOR-SET-C/SIMPLE-BIT-VECTOR on Alpha-32: srl-sll
          does not clean up upper bit (found by regression tests).