Ruby

• thread.c (recursive_): refactored the access to the inspect table used by
  rb_exec_recursive_. The functions recursive_push, pop and check now assume
  a valid hash table as their first argument. Added documentation.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@24891 b2dd03c8-39d4-4d8f-98ff-823fe69b080e