ST. LOUIS — The Cardinals drew even on the loss side with the Milwaukee Brewers at the top of the National League Central Division Thursday. Moments after the Brewers had been swept in a three-game series at Pittsburgh, the Cardinals completed a comeback to beat the Chicago Cubs 4-3 at Busch Stadium in the first game of a day-night doubleheader. One-one walks in the ninth to Nolan Arenado and Paul DeJong preceded Lars Nootbaar’s single to right off rooke Erich Uelman, with Arenado sliding home ahead of Willson Contreras’ tag. The Cubs had led 3-0 before the Cardinals rallied for three runs in …