If it's important, I would expose another piece of film the same way and develop it.
Colour neg film will handle 1 stop overexposure reasonably well. Usually with the colour negative films, you get a slight reduction in grain size with slight overexposure. I call slight overexposure ½ a stop.
At the risk of problems with the colour layers not developing correctly, I wouldn't pull C41.
I'm not an expert, but I have shot and developed quite a lot of C41 and generally speaking you will be quite alright with a 1 stop overexposure.
Mick.