MDL-52186 enrol_meta: Sync only active enrol_meta instances

Thanks to Peter Klinka for the solution!

enrol/meta/locallib.php

@@ -307,11 +307,12 @@ function enrol_meta_sync($courseid = NULL, $verbose = false) {
                                 ELSE 0 END) AS timeend
               FROM {user_enrolments} pue
               JOIN {enrol} pe ON (pe.id = pue.enrolid AND pe.enrol <> 'meta' AND pe.enrol $enabled)
-              JOIN {enrol} e ON (e.customint1 = pe.courseid AND e.enrol = 'meta' $onecourse)
+              JOIN {enrol} e ON (e.customint1 = pe.courseid AND e.enrol = 'meta' AND e.status = :enrolstatus $onecourse)
               JOIN {user} u ON (u.id = pue.userid AND u.deleted = 0)
          LEFT JOIN {user_enrolments} ue ON (ue.enrolid = e.id AND ue.userid = pue.userid)
              WHERE ue.id IS NULL
              GROUP BY pue.userid, e.id";
+    $params['enrolstatus'] = ENROL_INSTANCE_ENABLED;
 
     $rs = $DB->get_recordset_sql($sql, $params);
     foreach($rs as $ue) {