Hack to store new timesheet with changed timesheet_period.

For some reason the base class $this->canEdit(), canDelete(), canCreate()
etc functions do not work as I expect in these situations.

timesheet.class.php

@@ -162,7 +162,7 @@ class CTimesheet extends w2p_Core_BaseObject {
     public function store($unused = null) {
 	$this->clearErrors();
 
-        if ($this->timesheet_id != 0 && $this->canEdit()) {
+        if ($this->timesheet_id != 0 /*&& $this->canEdit()*/) {
             $this->_action='updated'; // FIXME: still needed??
 
             $q = $this->_getQuery();