* subversion/bindings/swig/ruby/libsvn_swig_ruby/swigutil_rb.h
  (ruby/io.h): Include the appropriate Ruby header if using Ruby 1.9 and
   thus avoid the 'use "ruby/io.h" instead of "rubyio.h"' warning.



git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1480765 13f79535-47bb-0310-9956-ffa450edef68