gc.c: full mark after malloc/realloc
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45655 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
gc.c: full mark after malloc/realloc
set in ruby_gc_stress. [ruby-core:62103] [Feature #9761]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45655 b2dd03c8-39d4-4d8f-98ff-823fe69b080e