FE: fatal error when clicking on "Vendor Information"

[lysov]

The url likes look index.php?option=com_virtuemart&view=virtuemart&task=vendorinfo&virtuemart_vendor_id=1 and caused following error:
Notice: Undefined index: vendor in /var/www/html/j17/libraries/joomla/application/component/view.php on line 371
Fatal error: Call to a member function setId() on a non-object in /var/www/html/j17/components/com_virtuemart/views/virtuemart/view.html.php on line 46

Joomla 1.7.2 VM svn 4701