When Johnny Cueto cringed on the mound and shook his head at the dugout, signaling he was hurt and done for the night, the San Francisco Giants had to be thinking the worst. This had all the makings of the horror movie the Giants have seen too many times this month and this season — the one where the S.F. bullpen just keeps on dying. No, the Giants bullpen did its job, holding on to the lead, which jumped to 2-0 after a ninth-inning insurance homer from Brandon Belt.