iseq.c: mark parents of wrapped iseq
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53514 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
iseq.c: mark parents of wrapped iseq
stack, it needs to take care of its parent and ancestors, so
that they do not become orphans. [ruby-core:72620] [Bug #11928]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53514 b2dd03c8-39d4-4d8f-98ff-823fe69b080e