If it was my DP that did this, then yes I'd probably let it go, because it would be deeply out of character for her. Both the initial thoughtlessness, and the being a dick about it as well. I'd be worried that something was wrong, rather than annoyed.
(Don't get me wrong, she's no angel. There's plenty of other stuff that she does that drives me up the wall on a regular basis, and that I'd happily stoop to her level in response for)
But as you said, he usually asks if you want something even when he's not going to see you for hours. That suggests to me that this is out of character, but only you know if this is characteristic of him.
Even if completely out of character, then I wouldn't let it go completely. But I'd come at it calmly tomorrow, point out that he seemed off last night, is something up, have you upset him in someway, is something else bothering him.
If he's an arse in response, or something similar happens again, then by all means release the hounds