Core: Suppress GCC false-positive

Author: Repiteo

scene/resources/packed_scene.cpp

@@ -144,6 +144,8 @@ static Node *_find_node_by_id(Node *p_owner, Node *p_node, int32_t p_id) {
 	return nullptr;
 }
 
+GODOT_GCC_WARNING_PUSH_AND_IGNORE("-Wmaybe-uninitialized") // False-positive on `ret_nodes`.
+
 Node *SceneState::instantiate(GenEditState p_edit_state) const {
 	// Nodes where instantiation failed (because something is missing.)
 	List<Node *> stray_instances;
@@ -702,6 +704,8 @@ Node *SceneState::instantiate(GenEditState p_edit_state) const {
 	return ret_nodes[0];
 }
 
+GODOT_GCC_WARNING_POP
+
 Variant SceneState::make_local_resource(Variant &p_value, const SceneState::NodeData &p_node_data, HashMap<Ref<Resource>, Ref<Resource>> &p_resources_local_to_sub_scene, Node *p_node, const StringName p_sname, HashMap<Ref<Resource>, Ref<Resource>> &p_resources_local_to_scene, int p_i, Node **p_ret_nodes, SceneState::GenEditState p_edit_state) const {
 	Ref<Resource> res = p_value;
 	if (res.is_null() || !res->is_local_to_scene()) {