Fixed #9618: Corrected an error in some example code in the forms documentation. Thanks matthijs.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@9517 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/topics/forms/index.txt

@@ -244,7 +244,7 @@ over them::
 
     {% if form.subject.errors %}
         <ol>
-        {% for error in form.message.errors %}
+        {% for error in form.subject.errors %}
             <li><strong>{{ error|escape }}</strong></li>
         {% endfor %}
         </ol>