function.
(sexp_check_type): Moved and renamed the spki_check_type function.
(sexp2bignum_u): New function.
(sexp_atom_eq): New function.
(sexp_atoms_eq): Renamed the previos sexp_atom_eq function.
(sexp_get_un): Use sexp2bignum_u.

Rev: src/sexp.c:1.28
Rev: src/sexp.h:1.27
Rev: src/spki.c:1.19