Bug while activate for multisite

Fix for error:
PHP Fatal error: Uncaught Error: Cannot use object of type WP_Site as array in wp-content\plugins\wp-print\wp-print.php:429 (or near such line)
wp-content/plugins/wp-print/wp-print.php

//$blog_id = isset( $ms_site['blog_id'] ) ? $ms_site['blog_id'] : $ms_site->blog_id;
				$blog_id = isset( $ms_site->blog_id ) ? $ms_site->blog_id : $ms_site->blog_id;