Update stray queries to PDO-style parameters

models/Asset.php

@@ -438,9 +438,9 @@ class Asset
 			$this->slug = $this->subdir . '/' . $this->title;
 			Registry::get('db')->query('
 				UPDATE assets
-				SET subdir = {string:subdir},
-					slug = {string:slug}
-				WHERE id_asset = {int:id_asset}',
+				SET subdir = :subdir,
+					slug = :slug
+				WHERE id_asset = :id_asset',
 				[
 					'id_asset' => $this->id_asset,
 					'subdir' => $this->subdir,