It's the prospective employers job to find out that information during the interview process (if they're legally allowed to ask the questions), not your job to volunteer it.  If they don't and give you the job then if it really affected your ability to do the job they could (probably) fire you.  As long as you don't flat out lie during the interview they haven't got a leg to stand on.

If you're selling a car you don't point out all its faults do you?  If the buyer doesn't spot them then that's their problem, not yours.

Michael.