[PATCH] Fix modification of nil value in Ruby test suite

The attached patch makes the Ruby 2.2 test suite failure I mentioned in
[0] go away, but this is all code I'm pretty unfamiliar with.

https://mail-archives.apache.org/mod_mbox/subversion-dev/201511.mbox/ajax/%3C20151108030937.GC8248%40freya.jamessan.com%3E

[[[
Create a new Ruby Object instead of attempting to modify nil.

Starting in Ruby 2.2, the nil, true, and false objects are frozen. This
was causing test_repos.rb's test_load to fail due to calling
"repos.load_fs(nil)". This results in svn_swig_rb_make_stream trying to
attributes on nil, which isn't allowed.

* subversion/bindings/swig/ruby/libsvn_swig_ruby/swigutil_rb.c:
  (svn_swig_rb_make_stream): Create a new Object if the given io is nil.
   Also call svn_swig_rb_get_pool in order to deduplicate some
   pool-handling code.
]]]

Cheers,

-- 
James
GPG Key: 4096R/331BA3DB 2011-12-05 James McCoy <jamessan_at_debian.org>