Simple anti-spam mechanism

inc/config.php

@@ -313,11 +313,12 @@
     );
 
     // Enable simple anti-spam measure.
+    /*
     $config['simple_spam'] = array (
             'prompt' => 'What is 2 + 2?',
             'answer' => '4'
         );
-
+    */
     // Enable reCaptcha to make spam even harder. Rarely necessary.
     $config['recaptcha'] = false;
 

post.php

@@ -483,9 +483,9 @@ function handle_post(){
             }
         }
 
-        if ($config['simple_spam'] && $post['op']) {
+        if (isset($config['simple_spam']) && $post['op']) {
-            if(!isset($_POST['simple_spam']) || $config['simple_spam']['answer'] != $_POST['simple_spam'])){
+            if(!isset($_POST['simple_spam']) || $config['simple_spam']['answer'] != $_POST['simple_spam']){
-                $config['error']['spam'];
+                error($config['error']['spam']);
             }
         }