related to #1693 fix tag menu warning

themes/default/template/menubar_tags.tpl

@@ -3,7 +3,7 @@
 	<div id="menuTagCloud">
 		{foreach from=$block->data item=tag}
 		<span>{strip}
-			<a class="tagLevel{$tag.level}" href=
+			<a class="tagLevel {if isset($tag.level)}{$tag.level}{/if}" href=
 			{if isset($tag.U_ADD)}
 				"{$tag.U_ADD}" title="{$tag.counter|@translate_dec:'%d photo is also linked to current tags':'%d photos are also linked to current tags'}" rel="nofollow">+
 			{else}