[CM] clm instrument won't compile

[Bill Schottstaedt]

> Just out of curiosity, can you have arrays in def-clm-struct? 

It turns out I forgot that the field type defaults to float, so 
the generator field does work in Scheme -- the snd-test.scm case
looks like:

(def-clm-struct sa1 (freq 0.0 :type float) (coscar #f :type clm) 
  (sincar #f :type clm) (dly #f :type clm) (hlb #f :type clm))

And arrays are doable in that context with vcts:

(def-clm-struct hiho2 (i 0 :type int) (x 0.0 :type float) (v #f :type vct) 
  (s "hiho") (ii 3 :type int) (xx 1.0 :type float))

But in Common Lisp, the field has to be a number (there's a list
of implemented types in run.lisp line 6770).  I can't remember whether
arrays would be hard to implement -- I was so traumatized by wasting
3 or 4 days of hacking on the generator fields that I suppressed
the whole episode.