0.9.8.28:

0.9.8.28:
        Oh, the embarrassment. x86-64 was using full calls to GENERIC-< and
        GENERIC-> for (UN)SIGNED-BYTE-64-P and CHECK-(UN)SIGNED-BYTE-64.
        Fix it.

        * Conditionalize type predicate, type predicate wrapper and
          typecheckfun creation on N-WORD-BITS. Add missing 64-bit
          cases.
        * Add missing SIGNED-BYTE-64 VOPs.
        * Nuke the now-unused 32-bit VOPs.