set default values for cycle dates, fixes #2

controllers/copy.php

@@ -245,8 +245,8 @@ class CopyController extends PluginController
                                 $newcycle->setData($cycledate->toArray());
                                 $newcycle->setId($newcycle->getNewId());
                                 $newcycle['seminar_id'] = $newcourse->getId();
-                                $newcycle['week_offset'] = Request::int("week_offset");
-                                $newcycle['end_offset'] = Request::get('end_offset') == 'last' ? $last_week : Request::int("end_offset");
+                                $newcycle['week_offset'] = Request::int('week_offset', 0);
+                                $newcycle['end_offset'] = Request::get('end_offset', 'last') == 'last' ? $last_week : Request::int("end_offset");
                                 $newcycle['mkdate'] = time();
                                 $newcycle['chdate'] = time();
                                 $newcycle->store();