* fixed some bugs revealed by Paul Dietz' test suite:
** ARRAY-IN-BOUNDS-P now allows arbitrary integers as arguments,
not just nonnegative fixnums;
** the logical bit-array operators such as BIT-AND now accept an
explicit NIL for their "opt-arg" argument (to indicate a
freshly-consed result bit-array);
* fixed some bugs revealed by Paul Dietz' test suite:
** ARRAY-IN-BOUNDS-P now allows arbitrary integers as arguments,
not just nonnegative fixnums;
** the logical bit-array operators such as BIT-AND now accept an
explicit NIL for their "opt-arg" argument (to indicate a
freshly-consed result bit-array);