[gnome-control-center] network: Fix crash creating a VPN

[Bastien Nocera <hadess src gnome org>]

commit 2a7b19202bfb017f1fdfe8f7e3c2f71d0f985093
Author: Bastien Nocera <hadess hadess net>
Date:   Mon Jun 13 16:56:27 2016 +0200

    network: Fix crash creating a VPN
    
    The listing of VPN plugins was done using the nm-glib API instead of the
    new libnm 1.2 one.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=767614

 .../connection-editor/net-connection-editor.c      |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)
---
diff --git a/panels/network/connection-editor/net-connection-editor.c 
b/panels/network/connection-editor/net-connection-editor.c
index 2945947..f0131b9 100644
--- a/panels/network/connection-editor/net-connection-editor.c
+++ b/panels/network/connection-editor/net-connection-editor.c
@@ -743,13 +743,14 @@ select_vpn_type (NetConnectionEditor *editor, GtkListBox *list)
 
         /* Add the VPN types */
         for (iter = vpn_plugins; iter; iter = iter->next) {
+                NMVpnEditorPlugin *plugin = nm_vpn_plugin_info_get_editor_plugin (iter->data);
                 char *name, *desc, *desc_markup, *service_name;
                 GtkStyleContext *context;
 
-                g_object_get (iter->data,
-                              "name", &name,
-                              "desc", &desc,
-                              "service", &service_name,
+                g_object_get (plugin,
+                              NM_VPN_EDITOR_PLUGIN_NAME, &name,
+                              NM_VPN_EDITOR_PLUGIN_DESCRIPTION, &desc,
+                              NM_VPN_EDITOR_PLUGIN_SERVICE, &service_name,
                               NULL);
                 desc_markup = g_markup_printf_escaped ("<span size='smaller'>%s</span>", desc);