* gc.c (gc_before_sweep): heap_pages_swept_slots should contains
  heap_pages_increment.
  For example, GC by exceeding malloc_limit can remain
  heap_pages_increment.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45959 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* gc.c (gc_marks, gc_marks_body): increase the counter of young objects
  at the major GC because AGE2Promotion changes all old objects into
  young objects at major GC.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45960 b2dd03c8-39d4-4d8f-98ff-823fe69b080e