No topic icon present fix. (max() [function.max]: Array must contain atleast one element)

root/portal/includes/functions.php

@@ -353,7 +353,7 @@ function phpbb_fetch_posts($forum_from, $permissions, $number_of_posts, $text_le
 		$i++;
 	}
 	
-	$posts['topic_icons'] = ( max($topic_icons) > 0 && $have_icons ) ? true : false;
+	$posts['topic_icons'] = ( (!empty($topic_icons)) && $have_icons ) ? true : false;
 
 	$posts['topic_count'] = $i;