merges r21859 from trunk into ruby_1_9_1. * ext/zlib/zlib.c (zstream_run): desperately guard the variable. [ruby-core:20576]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@21860 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merges r21859 from trunk into ruby_1_9_1.
* ext/zlib/zlib.c (zstream_run): desperately guard the variable.
[ruby-core:20576]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@21860 b2dd03c8-39d4-4d8f-98ff-823fe69b080e