git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@32514 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
rb_num2ulong(). fixed the problem of ObjectSpace._id2ref of IL32LLP64
platforms, introduced at r32433.
backported r32512 from trunk.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@32514 b2dd03c8-39d4-4d8f-98ff-823fe69b080e