* gc.c (gc_profile_clear, gc_profile_enable): remove rest_sweep().
* gc.c: check objspace->profile.current_record before inserting
  profiling record by new macro gc_prof_enabled().



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44276 b2dd03c8-39d4-4d8f-98ff-823fe69b080e