scene: allow nodes to have arbitrary parents
For instance, allow a surface node to be a child of another surface
node. This allows easier xdg-popup handling in compositors.
@@ -31,7 +31,6 @@ static void scene_node_state_finish(struct wlr_scene_node_state *state) {
static void scene_node_init(struct wlr_scene_node *node,
enum wlr_scene_node_type type, struct wlr_scene_node *parent) {
assert(type == WLR_SCENE_NODE_ROOT || parent != NULL);
- assert(parent == NULL || parent->type == WLR_SCENE_NODE_ROOT);
node->type = type;
node->parent = parent;
