convert a couple of get_records to recordset - memory usage in attendance is nasty.

lib.php

@@ -54,12 +54,13 @@ function attendance_supports($feature) {
 function att_add_default_statuses($attid) {
     global $DB;
 
-    $statuses = $DB->get_records('attendance_statuses', array('attendanceid'=> 0), 'id');
+    $statuses = $DB->get_recordset('attendance_statuses', array('attendanceid'=> 0), 'id');
     foreach ($statuses as $st) {
         $rec = $st;
         $rec->attendanceid = $attid;
         $DB->insert_record('attendance_statuses', $rec);
     }
+    $statuses->close();
 }
 
 function attendance_add_instance($attendance) {

locallib.php

@@ -1267,12 +1267,13 @@ class attendance {
         global $DB;
 
         $now = time();
-        $sessions = $DB->get_records_list('attendance_sessions', 'id', $sessionsids);
+        $sessions = $DB->get_recordset_list('attendance_sessions', 'id', $sessionsids);
         foreach ($sessions as $sess) {
             $sess->duration = $duration;
             $sess->timemodified = $now;
             $DB->update_record('attendance_sessions', $sess);
         }
+        $sessions->close();
         add_to_log($this->course->id, 'attendance', 'sessions duration updated', $this->url_manage(),
             get_string('sessionsids', 'attendance').implode(', ', $sessionsids), $this->cm->id);
     }