Make SAP node read-only

modules/services_discovery/sap.c

@@ -329,6 +329,7 @@ static int Open( vlc_object_t *p_this )
     p_view = playlist_ViewFind( p_playlist, VIEW_CATEGORY );
     p_sys->p_node = playlist_NodeCreate( p_playlist, VIEW_CATEGORY,
                                          _("SAP"), p_view->p_root );
+    p_sys->p_node->i_flags |= PLAYLIST_RO_FLAG;
     val.b_bool = VLC_TRUE;
     var_Set( p_playlist, "intf-change", val );