Excessive php warnings in log

There are a number of these warnings appearing in the apache error log:

PHP Warning: round() expects parameter 2 to be long, string given in wp-content/plugins/yop-poll/inc/yop_poll_model.php on line 1158

It seems to be generating one for each answer the poll allows. I fixed it by changing

$percentages_decimals = $poll_options[‘percentages_decimals’];

to

$percentages_decimals = intval($poll_options[‘percentages_decimals’]);

on lines 3562, 3663, and 3732 of version 4.9 of this plugin.

I think it is caused by not specifying the percentages_decimals value when setting the poll options.

http://ww.wp.xz.cn/plugins/yop-poll/