$NetBSD: patch-al,v 1.1 2009/05/16 11:46:09 obache Exp $

--- src/libstatgrab/network_stats.c.orig	2006-10-09 17:25:06.000000000 +0000
+++ src/libstatgrab/network_stats.c
@@ -177,6 +177,7 @@ sg_network_io_stats *sg_get_network_io_s
 				     net_ptr->ifa_name) < 0) {
 			return NULL;
 		}
+		if (net_ptr->ifa_data != NULL) {
 		net_data=(struct if_data *)net_ptr->ifa_data;
 		network_stat_ptr->rx=net_data->ifi_ibytes;
 		network_stat_ptr->tx=net_data->ifi_obytes;
@@ -187,6 +188,7 @@ sg_network_io_stats *sg_get_network_io_s
 		network_stat_ptr->collisions=net_data->ifi_collisions;
 		network_stat_ptr->systime=time(NULL);
 		interfaces++;
+		}
 	}
 	freeifaddrs(net);	
 #endif
