* internal.h (INTEGER_PACK_NEGATIVE): Defined.
  (rb_integer_unpack): sign argument removed.

* bignum.c (rb_integer_unpack): sign argument removed.
  Non-negative integers generated by default.
  INTEGER_PACK_NEGATIVE flag is used to generate non-positive integers.

* pack.c (pack_unpack): Follow the above change.

* random.c (int_pair_to_real_inclusive): Ditto.
  (make_seed_value): Ditto.
  (mt_state): Ditto.
  (limited_big_rand): Ditto.

* marshal.c (r_object0): Ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41239 b2dd03c8-39d4-4d8f-98ff-823fe69b080e