ST. LOUIS — The Dodgers’ offense isn’t quite fixed. But for one day, at least, it looked less broken than before. For the first time in almost a week, the Dodgers scored first Sunday, tagged an opposing starter with at least three runs … and, oh yeah, actually won a game, too, beating the Cardinals 4-1 to snap a four-game losing streak and avoid a series sweep at Busch Stadium. Dodgers pitcher Justin Wrobleski earned the win Sunday, going six innings and scattering six hits. Getty Images A tour de force, this was not. For the sixth straight game , the Dodgers (21-13) failed to hit a home run. For a second consecutive day, they also bounced into four double plays. In their last 12 games, they’ve now failed to eclipse five runs nine times. But behind another uniquely dominant start from left-hander Justin Wrobleski — who pitched six scoreless innings, despite not striking out a batter, to lower his ERA to 1.25 –– the Dodgers’ slumping lineup found a way to do just enough.…