 	}
 	
 	override func tableView(tableView: UITableView!, titleForHeaderInSection section: Int) -> String! {
-		if collation {
+		if collation != nil {
 			return collation!.sectionTitles[section] as? String
 		}
 		return nil

	// #pragma mark -
	
	func indexButtonDidTap(sender: AnyObject!) {
		if collation {
			collation = nil
		} else {
			collation = UILocalizedIndexedCollation.currentCollation() as? UILocalizedIndexedCollation

	}
	
	override func tableView(tableView: UITableView!, sectionForSectionIndexTitle title: String!, atIndex index: Int) -> Int {
		if collation != nil {
			return collation!.sectionForSectionIndexTitleAtIndex(index)
		}
		return index
