Call to undefined function votingapi_get_source() in rate.module on line 542

Hey all,

thanks for all the work you're doing on this module.

However, after the last update to version 7.x-1.7 we are getting this error

Fatal error: Call to undefined function votingapi_get_source() in /var/www/debates/sites/all/modules/contrib/rate/rate.module on line 542

The line 542 reads:

$criteria += array('vote_source' => votingapi_get_source());

It does not really matter what is the scenario, because the weird thing is that this function does not exists anywhere (even not on Google), also, when I download the module of the same version from Drupal.org project site, that line 542 reads:

$criteria += array('vote_source' => ip_address());

According to the git diff, this was the only changed since the most recent commit. What is happening, why is this change not in my module updated via drush?

Thanks.