subcompositor: use bad_parent error

meson.build

@@ -103,7 +103,7 @@ internal_config = configuration_data()
 
 wayland_project_options = ['tests=false', 'documentation=false']
 wayland_server = dependency('wayland-server',
-	version: '>=1.21',
+	version: '>=1.22',
 	fallback: 'wayland',
 	default_options: wayland_project_options,
 )

types/wlr_subcompositor.c

@@ -429,7 +429,7 @@ static void subcompositor_handle_get_subsurface(struct wl_client *client,
 
 	if (wlr_surface_get_root_surface(parent) == surface) {
 		wl_resource_post_error(resource,
-			WL_SUBCOMPOSITOR_ERROR_BAD_SURFACE,
+			WL_SUBCOMPOSITOR_ERROR_BAD_PARENT,
 			"wl_subsurface@%" PRIu32
 			" cannot be a parent of itself or its ancestor", id);
 		return;