$NetBSD: patch-ac,v 1.2 2012/10/22 23:47:15 rh Exp $

Prevent a crash if item is nil.

--- DriversPrefs.m.orig	2005-05-13 01:58:49.000000000 +1000
+++ DriversPrefs.m
@@ -198,7 +198,7 @@ static DriversPrefs *singleInstance = ni
 - (BOOL) outlineView: (NSOutlineView *)outlineView
 	isItemExpandable: (id) item
 {
-	if ([availableDrives objectForKey: ((DriversTableItem*)item)->display]) {
+	if (item && [availableDrives objectForKey: ((DriversTableItem*)item)->display]) {
 		return YES;
 	}
 	return NO;