(math-bignum-digit-length,math-bignum-digit-size,math-small-integer-size):

(math-bignum-digit-length,math-bignum-digit-size,math-small-integer-size):
New constants.
(math-normalize,math-bignum-big,math-make-float,math-div10-bignum)
(math-scale-left,math-scale-left-bignum,math-scale-right)
(math-scale-right-bignum,math-scale-rounding,math-add,math-add-bignum)
(math-sub-bignum,math-sub,math-mul,math-mul-bignum,math-mul-bignum-digit)
(math-idivmod,math-quotient,math-div-bignum,math-div-bignum-digit)
(math-div-bignum-part,math-format-bignum-decimal,math-read-bignum):
Use math-bignum-digit-length, math-bignum-digit-size and
math-small-integer-size.