Depending on how bad it is, and the inspector's attitude that day, the result could be anything from no notice, to a logbook notation to take care of it by next event, to banning you from the event...
Personally, as long as it's not in the driver's immediate field of view and does not appear to be a problem with the windshield stoving in during the event, I'd logbook-notate it. But, it's inspector's discretion...