Invalid if statements check for = not ==

CRM/Report/Form/Event/ParticipantListing.php
if ($value = $row['civicrm_participant_event_id']) {
if ($value = $row['civicrm_event_event_type_id']) {
if ($value = $row['civicrm_participant_status_id']) {
if ($value = $row['civicrm_participant_role_id']) {
if ($value = $row['civicrm_participant_participant_fee_level']) {
if ($value = $row['civicrm_address_country_id']) {
if ($value = $row['civicrm_address_state_province_id']) {
if ($value = $row['civicrm_contact_employer_id']) {

Array declaration that contain text character variables or values without quotations:
array('localize' => TRUE));