• bignum.c (validate_integer_pack_format): supported_flags argument
  added and validate given flags.
  (rb_integer_pack_internal): Specify supported_flags.
  (rb_integer_unpack): Ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41256 b2dd03c8-39d4-4d8f-98ff-823fe69b080e