fix PHP 8.0 TypeError: implode(): Argument #1 ($pieces) must be of type array, string given

infolog/inc/class.infolog_bo.inc.php

@@ -1396,6 +1396,7 @@ class infolog_bo
 	 */
 	function import_mail($_addresses,$_subject,$_message,$_attachments,$_date)
 	{
+		$names = $emails = [];
 		foreach($_addresses as $address)
 		{
 			$names[] = $address['name'];