PBGitRevList: Fix parsing of date

This slipped in when adding parent collecting.. oops

Author: pieter

PBGitRevList.m

@@ -62,7 +62,7 @@ - (void) walkRevisionList
 		newCommit.parents = parents;
 		newCommit.subject = [components objectAtIndex:2];
 		newCommit.author = [components objectAtIndex:1];
-		newCommit.date = [NSDate dateWithTimeIntervalSince1970:[[components objectAtIndex:3] intValue]];
+		newCommit.date = [NSDate dateWithTimeIntervalSince1970:[[components objectAtIndex:4] intValue]];
 
 		[newArray addObject: newCommit];
 		num++;