random.c: private rand
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56984 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
random.c: private rand
rand. [ruby-dev:49892] [Misc #13003]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56984 b2dd03c8-39d4-4d8f-98ff-823fe69b080e