Improve description to use readObject.

Author: joehni

xstream-distribution/src/content/faq.html

@@ -254,8 +254,8 @@ <h2 id="Serialization_initialize_transient">How do I initialize a transient fiel
     return this;
   }
 }</pre></div>
-<p>or</p>
-<div class="Source Java"><pre>class ThreadAwareComponent {
+<p>or in case your type implements java.io.Serializable, you have an alternative:</p>
+<div class="Source Java"><pre>class ThreadAwareComponent implements Serializable{
   private transient ThreadLocal component;
   // ...
   private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {