Using an incorrect 'status' parameter for certain collaboration fetch functions will cause a fatal error.

The expected status is parameter is an array() of possible values, but using true() will generate an sql query containing the following:

  WHERE ezcollab_item.status IN ( ) AND

As this query is not valid, a fatal error will occur.

Steps to reproduce:

Create and use a fetch function like the following:

  fetch("collaboration","item_count", hash("status", true()) )