[FIX]Module-last_tracker_items: Fixing undefined array key trackerId
requested to merge christer77/tiki:fix-undefined-array-key-trackerId-in-module-last_tracker_items into master
when using module-last_tracker_items like:
{MODULE(module="last_tracker_items" ) /} i.e without any parameter, an error occurs...
ERROR (E_WARNING): Undefined array key "trackerId"
At line 62 in D:\bureau\EvoluData-WikiSuite\tiki-master\modules\mod-func-last_tracker_items.php