Ball Corp. posted slimmer earnings in the fourth quarter despite a revenue gain. For the three months ending Dec. 31, the Broomfield-based maker of consumer packaging and aerospace equipment (NYSE: BLL) posted attributable net income of $60.6 million, or 39 cents per diluted share, down from $77.5 million, or 47 cents a share, in the same quarter a year earlier. Absent one-time items, such as plant closure costs, adjusted earnings were up to 64 cents from 48 cents in the year-ago quarter. Net…