Simplify and just use int for the return value of rb_io_wait_readable
Simplify and just use int for the return value of rb_io_wait_readable

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