Changes by: Jason Hickey (jyh at cs.caltech.edu)
Date: 2005-01-18 18:59:07 -0800 (Tue, 18 Jan 2005)
Revision: 6437
Log message:
1. Added some cases to refine_error.
2. Added Term_subst_sig.so_vars, to compute non-zero arity so-vars.
3. Opname type checking now works at least minimally.