MDL-9432 - When restoring questions, links are not recoded. Merged from OU moodle.

question/type/questiontype.php

@@ -71,6 +71,14 @@ class default_questiontype {
         return true;
     }
 
+    /**
+     * @return whether the question_answers.answer field needs to have 
+     * restore_decode_content_links_worker called on it.
+     */
+    function has_html_answers() {
+        return false;
+    }
+
     /**
     * Saves or updates a question after editing by a teacher
     *