Ruby » Ruby master

merges r32349 from trunk into ruby_1_9_2.¶

• string.c (tr_trans): free heap ptr when the str is not embeded.
  patched by Eric Wong. [Bug #4956] [ruby-core:37708]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@34430 b2dd03c8-39d4-4d8f-98ff-823fe69b080e