Missing argument 3 for ec_store_alloc_allocation() in ... ec_store.alloc.inc on line 89

This might issue might belong under ec_receipt, not ec_store.

A warning is received when reversing an allocation via ec_receipt_reverse_allocation_form [store/receipt/%ec_receipt/reverse/%]:
warning: Missing argument 3 for ec_store_alloc_allocation() in ecommerce/ec_store/ec_store.alloc.inc on line 89.

Is it possible the warning is originating in the ec_receipt.admin.inc function ec_receipt_reverse_allocation in the call to ec_receipt_alloc_invoke($alloc->type, 'allocation', $object, $total - $reversal->amount)?

/**
 * Reverse Allocation.
 * TODO: Convert to use drupal_write_record.
 */
function ec_receipt_reverse_allocation($receipt, $alloc) {
  if ($object = ec_receipt_alloc_invoke($alloc->type, 'load', $alloc->etid)) {
    if ((ec_receipt_alloc_invoke($alloc->type, 'can_reverse', $object)) === FALSE) {
      return FALSE;
    }
    $total = ec_receipt_alloc_invoke($alloc->type, 'get_total', $object);
    $reversal = drupal_clone($alloc);
    $reversal->eaid = db_last_insert_id('ec_receipt_allocation', 'eaid');
    $reversal->created = time();
    $reversal->amount*= -1;
    $reversal->reversed = $alloc->eaid;

    $receipt->allocated+= $reversal->amount;
    $receipt->balance-= $reversal->amount;

    ec_receipt_alloc_invoke($alloc->type, 'allocation', $object, $total - $reversal->amount);
    $sql = "INSERT INTO {ec_receipt_allocation} (eaid, erid, type, etid, created, amount, reversed) VALUES (%d, %d, '%s', '%s', %d, %d, %d)";
    db_query($sql, (array)$reversal);
    db_query('UPDATE {ec_receipt_allocation} SET reversed = %d WHERE eaid = %d', $reversal->eaid, $alloc->eaid);
    ec_receipt_save($receipt);
    return TRUE;
  }
}

Also should the balance be checked on reversal to prevent multiple reversals?

Thank you.