Handle <ol><ol> properly by adding missing <li> tag.

Signed-off-by: Edward Z. Yang <ezyang@mit.edu>

library/HTMLPurifier/ElementDef.php

@@ -97,6 +97,13 @@ class HTMLPurifier_ElementDef
      */
     public $autoclose = array();
 
+    /**
+     * If a foreign element is found in this element, test if it is
+     * allowed by this sub-element; if it is, instead of closing the
+     * current element, place it inside this element.
+     */
+    public $wrap;
+
     /**
      * Whether or not this is a formatting element affected by the
      * "Active Formatting Elements" algorithm.