Please don't post off-topic comments like this; instead, you can vouch for the dead comment by clicking on its timestamp to go to its page, then clicking 'vouch' at the top. (To do this requires being logged in and having more than 30 karma.)
Clicked around looking for such a feature, it was not apparent to me. Now that you pointed it out, I'll do it next time. I'd recommend making the "vouch" appear directly on the comment.