io.c: warn old write
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60423 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
io.c: warn old write
argument. [ruby-core:83529] [Feature #14042]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60423 b2dd03c8-39d4-4d8f-98ff-823fe69b080e