CSV export not working on PHPFIWA feeds on emoncms.org

When I try to export feed data to csv for PHPFIWA feeds on emoncms.org, I don't get any data in the .csv file, just error messages:


Warning: number_format() expects parameter 2 to be long, string given in /var/www/html/phpfiwa/PHPFiwa.php on line 961
1450020780,

Warning: number_format() expects parameter 2 to be long, string given in /var/www/html/phpfiwa/PHPFiwa.php on line 961
1450020800,

Warning: number_format() expects parameter 2 to be long, string given in /var/www/html/phpfiwa/PHPFiwa.php on line 961
1450020820,

With PHPFINA it is working ok. Have you seen this before?