ensure we have an array

Lib/Formatter/Html.php

@@ -41,6 +41,7 @@ class Html extends Formatter {
         // so take the first element of the 'result' array
         $func = key($data['result']);
         $data = reset($data['result']);
+        $data = is_array($data) ? $data : array();
         $title = $func;
 
         $content = '';