Over the summer, Halo Top Creamery became the best-selling pint of ice cream. Under the lid it reads, “Stop when you hit the bottom” and “guilt-free zone, keep digging.” But Samantha Heller, a registered dietician, says the slogans. A serious question posed by a female sports reporter was apparently funny to Carolina Panthers quarterback Cam Newton. During a Panthers press conference on Wednesday, the quarterback was asked a question about…