STILL NON-FUNCTIONAL. ESURIENT AS A SHARK.
for now, since hash tables are still implemented with
(UNSIGNED-BYTE 32) vectors
... ensure that SXHASH returns an (UNSIGNED-BYTE 29)
... and GLOBALDB-SXHASHOID, too
(at this point, the system gets about one quarter of the
way through reversed-toplevel-forms-and-fixups before dying
with a segmentation fault)