m-si-standard-link: set out-item-id and in-item-id properties

modules/module-si-standard-link.c

@@ -143,10 +143,14 @@ si_standard_link_configure (WpSessionItem * item, WpProperties * p)
   out_item = get_and_validate_item (si_props, "out-item");
   if (!out_item)
     return FALSE;
+  wp_properties_setf (si_props, "out-item-id", "%u",
+      wp_session_item_get_id (out_item));
 
   in_item = get_and_validate_item (si_props, "in-item");
   if (!in_item)
     return FALSE;
+  wp_properties_setf (si_props, "in-item-id", "%u",
+      wp_session_item_get_id (in_item));
 
   self->out_item_port_context = wp_properties_get (si_props,
       "out-item-port-context");