Suppress emitting quicksearch plugin in sidebar

Next has a quicksearch widget in the header already.

templates/next/sidebar.tpl

@@ -2,12 +2,14 @@
 <div id="serendipity{$pluginside}SideBar">
 {/if}
 {foreach from=$plugindata item=item}
+{if $item.class != "serendipity_plugin_quicksearch"}
 	<section class="widget {$item.class}">
     {if $item.title != ""}
     	<h3>{$item.title}</h3>
 	{/if}
     	{$item.content}
     </section>
+{/if}
 {/foreach}
 {if $is_raw_mode}
 </div>