Photo: Kimberley French/A24/Everett Collection A week before the wide release of Heretic , audiences in select theaters did more than just watch and listen to the new A24 horror flick. They also smelled it, thanks to a stab at a gimmick that movie theaters have tried to make happen several times with limited success. Viewers who didn’t sniff out these blueberry-scented screenings won’t be missing anything essential when Heretic opens, odorless, on November 8. But the film’s brief deployment of