Restore alphabet in members list - fixes #2168

Signed-off-by: emanuele <emanuele45@gmail.com>

themes/default/Memberlist.template.php

@@ -67,7 +67,7 @@ function template_memberlist()
 		<h2 class="category_header">
 			<span class="floatleft">', $txt['members_list'], '</span>';
 
-	if (!isset($context['in_search']))
+	if (empty($context['in_search']))
 		echo '
 				<span class="floatright letter_links">', $context['letter_links'], '</span>';