[network-manager-applet] info-dialog: don't try to process ipv4 settings where there are none

[Lubomir Rintel <lkundrak src gnome org>]

commit 25b5f766ed8d1213ad10238a2e8e9fed1a5cd10f
Author: Lubomir Rintel <lkundrak v3 sk>
Date:   Fri Mar 11 18:05:31 2016 +0100

    info-dialog: don't try to process ipv4 settings where there are none
    
    Who uses IPv4 anyway?

 src/applet-dialogs.c |   21 ++++++++++++++++-----
 1 files changed, 16 insertions(+), 5 deletions(-)
---
diff --git a/src/applet-dialogs.c b/src/applet-dialogs.c
index ff5b1bd..a3281bb 100644
--- a/src/applet-dialogs.c
+++ b/src/applet-dialogs.c
@@ -620,14 +620,20 @@ info_dialog_add_page (GtkNotebook *notebook,
        row++;
 
        ip4_config = nm_device_get_ip4_config (device);
-       addresses = nm_ip_config_get_addresses (ip4_config);
+       if (ip4_config) {
+               addresses = nm_ip_config_get_addresses (ip4_config);
+               gateway = nm_ip_config_get_gateway (ip4_config);
+       } else {
+               addresses = NULL;
+               gateway = NULL;
+       }
+
        if (addresses && addresses->len > 0)
                def_addr = (NMIPAddress *) g_ptr_array_index (addresses, 0);
 
        display_ip4_info (def_addr, addresses, grid, &row);
 
        /* Gateway */
-       gateway = nm_ip_config_get_gateway (ip4_config);
        if (gateway && *gateway) {
                desc_widget = create_info_label (_("Default Route:"), FALSE);
                desc_object = gtk_widget_get_accessible (desc_widget);
@@ -667,13 +673,18 @@ info_dialog_add_page (GtkNotebook *notebook,
        ip6_config = nm_device_get_ip6_config (device);
        if (ip6_config) {
                addresses = nm_ip_config_get_addresses (ip6_config);
-               if (addresses && addresses->len > 0)
-                       def6_addr = (NMIPAddress *) g_ptr_array_index (addresses, 0);
+               gateway = nm_ip_config_get_gateway (ip6_config);
+       } else {
+               addresses = NULL;
+               gateway = NULL;
        }
+
+       if (addresses && addresses->len > 0)
+               def6_addr = (NMIPAddress *) g_ptr_array_index (addresses, 0);
+
        display_ip6_info (def6_addr, addresses, method, grid, &row);
 
        /* Gateway */
-       gateway = nm_ip_config_get_gateway (ip6_config);
        if (gateway && *gateway) {
                desc_widget = create_info_label (_("Default Route:"), FALSE);
                desc_object = gtk_widget_get_accessible (desc_widget);