Dealer advises opponent. Whaddya do?

[Guy McSucker]

So I'm playing $15/30 at Bellagio and a huge pot comes up. Long story short, I have QQ and the board is J55T. It's the turn. I have check-raised this guy who I am pretty sure is holding JT - you should have seen him light up when the T fell. And the pot is gigantic because it was five bets seven ways preflop.

He is grabbing for more chips.

Dealer leans over and tells him that if I have an overpair then JT is no good.

I didn't react at the time - I was too busy worrying about the inevitable J, T, K or A river - but obviously I should have done something. What should I have done?

Guy.