Odd and even class is reversed in field template

I cannot find a related issue reporting this bug so I create a new issue.

This bug can be reproduced by
- creating a multiple value field to page content type
- creating a new page node and adding values to that field

So when you save this page and you can see the class of first field item has even and second one has class odd.

Here is the code in the field.tpl.php

<div class="field-item <?php print $delta % 2 ? 'odd' : 'even'; ?>"<?php print $item_attributes[$delta]; ?>><?php print render($item); ?></div>

Note that the $delta of field always starts from 0, which makes the first item has 'even' class.

Just need to swap two class names to fix the bug.

I have checked Drupal 8 and there is no odd and even class used in field.html.twig anymore. So I assume only to fix Drupal 7.