[VarDumper] Minor fix for the uniformity

src/Symfony/Bundle/DebugBundle/Resources/views/Profiler/dump.html.twig

@@ -69,6 +69,7 @@
         }
     </style>
 
+    {% if collector.dumpsCount %}
         <ul class="alt">
             {% for dump in collector.getDumps('html') %}
             <li class="sf-dump sf-reset">
@@ -93,4 +94,9 @@
             </li>
             {% endfor %}
         </ul>
+    {% else %}
+        <p>
+            <em>No dumped variable</em>
+        </p>
+    {% endif %}
 {% endblock %}