* ext/openssl/ossl_bn.c (ossl_bn_initialize): Use rb_integer_pack.
  Fix SEGV by OpenSSL::BN.new(1 << (2**34)).



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44909 b2dd03c8-39d4-4d8f-98ff-823fe69b080e