Fix some dbus-glib implementation details on the client side

sflphone-gtk/src/actions.c

@@ -164,6 +164,8 @@ sflphone_fill_account_list(gboolean toolbarInitialized)
 	{
 		account_t  * a = account_list_get_nth (i);
 		GHashTable * details = (GHashTable *) dbus_account_details(a->accountID);
+        if( details == NULL )
+            break;
 		a->properties = details;
 
 		gchar * status = g_hash_table_lookup(details, "Status");

sflphone-gtk/src/dbus.c

@@ -177,12 +177,12 @@ dbus_connect ()
 {
 
   GError *error = NULL;
+  connection = NULL;
   
   g_type_init ();
 
-  error = NULL;
-  connection = dbus_g_bus_get (DBUS_BUS_SESSION,
-                               &error);
+  connection = dbus_g_bus_get (DBUS_BUS_SESSION, &error);
+  
   if (connection == NULL)
   {
     g_printerr ("Failed to open connection to bus: %s\n",
@@ -281,6 +281,7 @@ dbus_clean ()
 {
     g_object_unref (callManagerProxy);
     g_object_unref (configurationManagerProxy);
+    g_object_unref (instanceProxy);
 }