Fix wlr_wl/xdg_shell_destroy segfault

- Implement xdg_shell_destroy and use it at the right place
(impl->destroy is never called)
- Remove wl_global_destroy for now, something is missing with the
display/registry_resource_list

types/wlr_wl_shell.c

@@ -145,6 +145,7 @@ void wlr_wl_shell_destroy(struct wlr_wl_shell *wlr_wl_shell) {
 		wl_list_remove(link);
 	}
 	// TODO: destroy surfaces
-	wl_global_destroy(wlr_wl_shell->wl_global);
+	// TODO: this segfault (wl_display->registry_resource_list is not init)
+	// wl_global_destroy(wlr_wl_shell->wl_global);
 	free(wlr_wl_shell);
 }

types/wlr_xdg_shell_v6.c

@@ -158,12 +158,15 @@ static void xdg_shell_pong(struct wl_client *client,
 }
 
 static struct zxdg_shell_v6_interface xdg_shell_impl = {
-	.destroy = resource_destroy,
 	.create_positioner = xdg_shell_create_positioner,
 	.get_xdg_surface = xdg_shell_get_xdg_surface,
 	.pong = xdg_shell_pong,
 };
 
+static void xdg_shell_destroy(struct wl_resource *resource) {
+	wl_list_remove(wl_resource_get_link(resource));
+}
+
 static void xdg_shell_bind(struct wl_client *wl_client, void *_xdg_shell,
 		uint32_t version, uint32_t id) {
 	struct wlr_xdg_shell_v6 *xdg_shell = _xdg_shell;
@@ -175,7 +178,7 @@ static void xdg_shell_bind(struct wl_client *wl_client, void *_xdg_shell,
 	}
 	struct wl_resource *wl_resource = wl_resource_create(
 		wl_client, &zxdg_shell_v6_interface, version, id);
-	wl_resource_set_implementation(wl_resource, &xdg_shell_impl, xdg_shell, NULL);
+	wl_resource_set_implementation(wl_resource, &xdg_shell_impl, xdg_shell, xdg_shell_destroy);
 	wl_list_insert(&xdg_shell->wl_resources, wl_resource_get_link(wl_resource));
 }
 
@@ -207,6 +210,7 @@ void wlr_xdg_shell_v6_destroy(struct wlr_xdg_shell_v6 *xdg_shell) {
 		wl_list_remove(link);
 	}
 	// TODO: destroy surfaces
-	wl_global_destroy(xdg_shell->wl_global);
+	// TODO: this segfault (wl_display->registry_resource_list is not init)
+	// wl_global_destroy(xdg_shell->wl_global);
 	free(xdg_shell);
 }