vm_eval.c: fix for rb_check_funcall_default
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58984 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
vm_eval.c: fix for rb_check_funcall_default
returns Qundef if respond_to_missing is not redefined.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58984 b2dd03c8-39d4-4d8f-98ff-823fe69b080e