[network-manager-applet] c-e: take reference to NMVpnEditorPlugin instance in "page-vpn.c"

[Thomas Haller <thaller src gnome org>]

commit 801742a796ac2adcee91a6f2458f33a6b73bc725
Author: Thomas Haller <thaller redhat com>
Date:   Fri Apr 29 17:33:52 2016 +0200

    c-e: take reference to NMVpnEditorPlugin instance in "page-vpn.c"

 src/connection-editor/page-vpn.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/src/connection-editor/page-vpn.c b/src/connection-editor/page-vpn.c
index 76b2f3b..a373495 100644
--- a/src/connection-editor/page-vpn.c
+++ b/src/connection-editor/page-vpn.c
@@ -58,7 +58,7 @@ finish_setup (CEPageVpn *self, gpointer unused, GError *error, gpointer user_dat
        if (error)
                return;
 
-       g_return_if_fail (priv->plugin != NULL);
+       g_return_if_fail (NM_IS_VPN_EDITOR_PLUGIN (priv->plugin));
 
        priv->editor = nm_vpn_editor_plugin_get_editor (priv->plugin, parent->connection, &vpn_error);
        if (!priv->editor) {
@@ -119,6 +119,7 @@ ce_page_vpn_new (NMConnectionEditor *editor,
                g_object_unref (self);
                return NULL;
        }
+       priv->plugin = g_object_ref (priv->plugin);
 
        g_signal_connect (self, "initialized", G_CALLBACK (finish_setup), NULL);
 
@@ -160,6 +161,8 @@ dispose (GObject *object)
        }
        g_clear_pointer (&priv->service_type, g_free);
 
+       g_clear_object (&priv->plugin);
+
        G_OBJECT_CLASS (ce_page_vpn_parent_class)->dispose (object);
 }