Accessing any recording schedule with lite template results in warning

[Nigel Jewell]

If I access tv/detail?recordid=... when using the lite template mythweb displays an error.

  error type:  Warning
error string:  !!NoTrans: Attempt to modify property 'recgroup' of non-object!!
    filename:  .../modules/tv/classes/Schedule.php
  error line:  631

This is because the called to recgroup_select incorrectly reference recgroup.