By Dan Weil Consumer prices soared 8.2% through September, and that’s reportedly hitting holiday spending. If this report is correct, some of you will be giving thanks for smaller portions of food this Thanksgiving. A total of 38% of shoppers plan to trim their spending for Thanksgiving dinner, thanks to inflation, according to a survey by 84.51°, a Cincinnati-based retail data company. Consumer prices soared 8.2% in the 12 months through September. Do keep in mind that surveys of holiday spending frequently point to consumers shelling out less than they actually do. In any case, among those w…