The only reason they don't want you to eat is in case you need a general anaesthetic, as the risk of food getting in your lungs is slightly increased. But if you weren't pregnant, had a car accident, and needed an operation immediately, they wouldn't say no just because you'd eaten an hour beforehand. So if they can do it in that situation, then I think the benefits of eating in labour well outweigh the teeny tiny risk you will need a general anaesthetic and the even teenier tinier risk you would aspirate
xxx