@Jaime - the *decent* thing to do in that situation is for those who have excess to give to those less fortunate, but you can't *mandate* decency. Therefore, I wouldn't consider it a "right". It would be the Right Thing To Do - as in, correct - but not a Right in the sense of "you have to do this"
The details also matter. Did the person spend his money on a big screen TV instead of food for his family? In that case, my sympathy is minimal - they made a *choice* to watch Wheel of Fortune instead of eat. It's what I think is a *stupid* choice, but people make them - which is why assistance given to those in poverty here tends to be in a form that can only be *spent* on food.
To the best of my knowledge - and I freely admit I'm hardly an expert - there is very little starvation in the United States. That is because the people have elected politicians who fund programs that offer support. So, in that sense, the electorate has decided it's a Bad Thing to have people starve to death.
Does that equate to a de-facto "right to food"? I don't know if I would describe it that way. In a sense, our society have given people the *privilege* not to starve, assuming they follow some *conditions* to get the food (fill out some paperwork, listen to someone drone on the lectern for a few hours). That doesn't mean you can just show up at a grocery store and say "feed me, I have the right" - it's something we as a society have decided to do because we find it just, not because we *have* to. Fully granting that I wouldn't exceptionally *want* to live in a society where people starved, but take a look at history and there are plenty of examples.
This assumes there is enough surplus food around, of course. The people giveth, and the people taketh away - in case of famine, people are going to be much more interested in keeping their own families alive rather than the 'rights' of some stranger. "Rights" like that are based on a society being rich enough to grant them.