* gc.c (garbage_collect_body): fix GC_ENABLE_LAZY_SWEEP condition.
* gc.c (GC_NOTIFY): move debug print location and use stderr instead
  of stdout.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40968 b2dd03c8-39d4-4d8f-98ff-823fe69b080e