Merge pull request #103 from Kanti/master

small fixes by @Kanti

cache/installedVersion.json

@@ -1,4 +1,4 @@
 {
-    "id": 397789,
-    "tag_name": "v2.2"
+    "id": 587750,
+    "tag_name": "v2.4"
 }

system/includes/functions.php

@@ -1192,7 +1192,9 @@ EOF;
 
 // The not found error
 function not_found() {
-    error(404, render('404', null, false));
+    header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found");
+    render('404', null, false);
+    die();
 }
 
 // Turn an array of posts into an RSS feed