Looks like a finish crack. Not much you can do about it (besides an expensive refin) but it's not going to hurt anything either. Play away!
Did something happen? I had one that got a crack there when someone sat on it. (no big deal it was a cheap squire I traded a cheap practice amp for.
No, I just noticed it after I bought it, but it was a DK2S for $450 so there's bound to be some damage. Thanks for telling me it's not going to harm the guitar now I'm not so worried about it.
If nothing happened it's probably just a finish crack. Won't affect anything but I would put some clear fingernail polish on it just to keep from letting humidity and such get to the wood