[CM] troubles with ladspa menu

[Bill Schottstaedt]

It's only a few files, like ladspa.scm, that need threads -- I think 
I can add a warning to them -- there's probably an entry in the
*features* list I can check for.  

Did you compile the instrument before trying to load it in cmucl?
If you load the lisp source code, I think that's the error you get.
(You need to compile it to force the "run" macro to expand).