avoid erroring when creating embed links for queries that don't have any parameters (#3680)
avoid erroring when creating embed links for queries that don't have any parameters (#3680)


alexanderlz/redash,getredash/redash,denisov-vlad/redash,getredash/redash,getredash/redash,alexanderlz/redash,denisov-vlad/redash,getredash/redash,getredash/redash,alexanderlz/redash,denisov-vlad/redash,denisov-vlad/redash,alexanderlz/redash,denisov-vlad/redash