Fix an E_NOTICE caused when viewing 'my friends'

htdocs/lib/smarty/plugins/function.contextualhelp.php

@@ -22,9 +22,10 @@
 function smarty_function_contextualhelp($params, &$smarty) {
     $form = (isset($params['form'])) ? $params['form'] : null; 
     $element = (isset($params['element'])) ? $params['element'] : null;
+    $section = (isset($params['section'])) ? $params['section'] : null;
 
     $ret = call_user_func_array('get_help_icon', array(
-        $params['plugintype'], $params['pluginname'], $form, $element, null, $params['section']));
+        $params['plugintype'], $params['pluginname'], $form, $element, null, $section));
 
     // If there is an 'assign' parameter, place it into that instead.
     if (!empty($params['assign'])) {