array.c: id_random
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44066 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
array.c: id_random
instead of no longer used sym_random.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44066 b2dd03c8-39d4-4d8f-98ff-823fe69b080e