Move Loader::__destruct to the bottom of the method list

refs #5786

library/Icinga/Application/ClassLoader.php

@@ -19,14 +19,6 @@ class ClassLoader
      */
     private $namespaces = array();
 
-    /**
-     * Detach spl autoload method from stack
-     */
-    public function __destruct()
-    {
-        $this->unregister();
-    }
-
     /**
      * Register new namespace for directory
      *
@@ -138,4 +130,12 @@ class ClassLoader
     {
         spl_autoload_unregister(array($this, 'loadClass'));
     }
+
+    /**
+     * Detach spl autoload method from stack
+     */
+    public function __destruct()
+    {
+        $this->unregister();
+    }
 }