qtype_multichoice MDL-25208 another problem with editing.

Thanks to Patrick Pollet for spotting this.

question/type/multichoice/questiontype.php

@@ -74,7 +74,7 @@ function save_question_options($question) {
             if (is_array($answerdata)) {
                 // Doing an import
                 $answer->answer = $this->import_or_save_files($answerdata,
-                        $context, 'question', 'answerfeedback', $answer->id);
+                        $context, 'question', 'answer', $answer->id);
                 $answer->answerformat = $answerdata['format'];
             } else {
                 // Saving the form