Sat Apr 11 11:05:49 CEST 2009 asf@boinkor.net * Don't pass nil initial-bindings for new threads on Clozure CL.

Clozure CL /really/ doesn't like having no initial bindings in a thread. Passing this option causes essential bindings to not get transported to a new thread, see http://clozure.com/pipermail/openmcl-devel/2009-April/009125.html and the remaining thread for details.