MDL-29239 fixed edit course setting for moodle/course:changesummary p…

…ermission is set to prevent.

lib/form/editor.php

@@ -58,7 +58,7 @@ function setValue($values) {
     }
 
     function getValue() {
-        return $this->getAttribute('value');
+        return $this->_values;
     }
 
     function getMaxbytes() {
@@ -276,4 +276,13 @@ function toHtml() {
         return $str;
     }
 
+     /**
+     * What to display when element is frozen.
+     *
+     * @return empty string
+     */
+    function getFrozenHtml() {
+
+        return '';
+    }
 }