Error in node_images_update_1()

I downloaded the latest 5.x snapshot and when running update.php I got the following error:

Drupal database update

* : Object of class stdClass could not be converted to string in C:\xxxxxx\sites\default\modules\node_images\node_images.install on line 56.
* : Object of class stdClass could not be converted to string in C:\xxxxxx\sites\default\modules\node_images\node_images.install on line 56.
* : Object of class stdClass could not be converted to string in C:\xxxxxx\sites\default\modules\node_images\node_images.install on line 56.
* : Object of class stdClass could not be converted to string in C:\xxxxxx\sites\default\modules\node_images\node_images.install on line 56.
* : Object of class stdClass could not be converted to string in C:\xxxxxx\sites\default\modules\node_images\node_images.install on line 56.