spec/ruby/optional/capi/ext/io_spec.c: guard unreachable code
spec/ruby/optional/capi/ext/io_spec.c: guard unreachable code

git-svn-id: ab86ecd26fe50a6a239cacb71380e346f71cee7d@64379 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ruby/spec,ruby/rubyspec,eregon/rubyspec,nobu/rubyspec,ruby/spec,eregon/rubyspec,nobu/rubyspec,ruby/spec,nobu/rubyspec,ruby/rubyspec,eregon/rubyspec