Does that show up in every photo or just that one? That looks like a lower light situation and sometimes the lens will cause odd colors and patterns when encountering this. It doesn't mean there is necessarily anything wrong with the camera, just how it deals with those situations. Odd things can happen in really bright conditions, too.

 

I've read some posts where people discovered there was still some protective plastic on their camera lens. Do you remember removing the plastic from your camera lens? Just a thought...

 

I think it's just the nature of the camera then. In other words, how it processes the information in those situations. If it occurred at all times, I could see it being a hardware problem that would need to be fixed or replaced. The camera on this phone is good, but isn't known for its low light performance.