enum.c: suppress warnings
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45292 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
enum.c: suppress warnings
[ruby-core:61340] [Bug #9605]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45292 b2dd03c8-39d4-4d8f-98ff-823fe69b080e