runtests.rb in rio-0.3.6

- old
+ new

@@ -1,9 +1,11 @@
 #!/usr/bin/ruby
 Dir.chdir File.dirname(__FILE__)
 $devlib=File.expand_path('../lib/')
 $:.unshift $devlib unless $:[0] == $devlib
 
+$mswin32 = (RUBY_PLATFORM =~ /mswin32/)
+
 require 'rio'
 require 'test/unit'
 
 require 'tc/all'
 $trace_states = false