advpoll_calculate_results_binary() escapes values with " instead of ', which fails on Postgres

The function advpoll_calculate_results_binary() in modes/binary.inc uses " to escape the values in the query.
This query will fail on postgres. Correct escape char for postgres is '.

Wrong:
$result = db_query('SELECT uid, vote_source FROM {votingapi_vote} WHERE content_type = "advpoll" AND content_id = %d AND value_type = "option" GROUP BY uid, vote_source, timestamp', $node->nid);

Correct:
$result = db_query("SELECT uid, vote_source FROM {votingapi_vote} WHERE content_type = 'advpoll' AND content_id = %d AND value_type = 'option' GROUP BY uid, vote_source, timestamp", $node->nid);