A state appeals court on Friday revived the post-conviction petition of a man convicted of shooting at a Chicago police officer, finding he raised an arguable claim of ineffective counsel.The 1st District Appellate Court’s ruling is the first victory Cesar Camayo has scored since he was convicted of two counts of aggravated discharge of a firearm in 2010.Camayo has alleged that his counsel failed to follow up on conflicting witness accounts that would have called into question the veracity of the police officer who …