Latte bug

{if $a}
    <form>
        <div>
            <div>
                <div>
                    <input value="{if $a==$b}0{else}{$c['min_s']{/if}">
                    <input value="{if $a==$b}0{else}{$c['max_s']{/if}">
                </div>
            </div>

            <!-- ajax overlay -->
            <div id="filter-ajax-overlay"><ul class="loader"><li></li><li></li><li></li></ul></div>
        </div>

        <ul id="sorting" class="nav nav-tabs nav-tabs-square">
            <li{if $_order == 'default'} class="active"{/if}>
                <a href="{url(true, array_merge($_GET, array('order' => 'default')))}">Doporučujeme</a>
            </li>
            <li{if $_order == 'sales'} class="active"{/if}>
                <a href="{url(true, array_merge($_GET, array('order' => 'sales', 'dir-desc' => 1, 'dir-asc' => '')))}">Nejeprodávanější</a>
            </li>
            <li{if $_order == 'price' && $_order_dir == 'ASC'} class="active"{/if}>
                <a href="{url(true, array_merge($_GET, array('order' => 'price', 'dir-desc' => '', 'dir-asc' => 1)))}">Nejlevnější</a>
            </li>
            <li{if $_order == 'price' && $_order_dir == 'DESC'} class="active"{/if}>
                <a href="{url(true, array_merge($_GET, array('order' => 'price', 'dir-desc' => 1, 'dir-asc' => '')))}">Nejdražší</a>
            </li>
        </ul>
    </form>
{/if}