forgot to render errors

mediagoblin/templates/mediagoblin/utils/wtforms.html

@@ -94,6 +94,11 @@
       {{ field }}</input>
       {{ field.description|safe }}
     </label>
-</div>
+    {%- if field.errors -%}
+      {% for error in field.errors %}
+        <p class="form_field_error">{{ error }}</p>
+      {% endfor %}
+    {% endif %}
+  </div>
 {% endmacro %}