[CM] troubles with ladspa menu

[Bill Schottstaedt]

call-with-new-thread has been in Guile since at least version 1.3.4, but
you need to build Guile with threads support.  Was your version built
with --disable-linuxthreads or some such switch?  If you run guile
itself, I think you'll get the same error:

guile> call-with-new-thread
<unnamed port>: In expression call-with-new-thread:
<unnamed port>: Unbound variable: call-with-new-thread
ABORT: (unbound-variable)