Pass $args with & to persist changes

This prevents changes to survey_id being lost when editing records for
a different survey.

prebuilt_forms/dynamic_sample_occurrence.php

@@ -806,7 +806,7 @@ protected static function getGrid($args, $nid, $auth) {
    * will load the occurrences.
    * When displaying just one occurrence we must load the sample and the occurrence
    */
-  protected static function getEntity($args, $auth) {
+  protected static function getEntity(&$args, $auth) {
     data_entry_helper::$entity_to_load = array();
     if ((call_user_func(array(self::$called_class, 'getGridMode'), $args))) {
         // multi-record mode using a checklist grid. We really just need to know the sample ID.