I agree, don't make it an issue. DD1 was "square" for quite a long time - from age 8-12ish. She used to grow out, then up, and get the terrible munchies during these periods. She is now a trim size 10-12 with a tiny waist, at 16, and has been like this for a couple of years. She does have quite big legs, but she does a lot of sport, so they are muscular.
She was "teased" remorselessly about her weight and being fat by a friend of hers, and the friend's mother when she was younger and used to get very upset by it. But I think she now gets some grim satisfaction from the fact that her friend who was doing the teasing has now piled on the weight (her mother told me that she was size 16-18; I'm afraid I commented "Oh and she used to be so slim when she was younger," - not big and not clever, I know, but they did upset DD1 so much).
The only thing I did during the munchies period was to offer more healthy options for snacks, like fruit, cereal, raw carrots and hummous, ryvita and small pieces of cheese or cottage cheese, a sandwich with wholemeal bread and chicken or ham. Don't get me wrong, we had cake and chocolate too, it was just that we made sure that these weren't the "go to" foods. Fortunately she didn't have much of a sweet tooth, and still doesn't, as I have found bags of sweets in her room that date back from October half term when we went to New York. 