Made DO-CLAUSE a sublass of UNCONDITIONAL-CLAUSE.
Made DO-CLAUSE a sublass of UNCONDITIONAL-CLAUSE.

vtomole/SICL,clasp-developers/SICL,clasp-developers/SICL,vtomole/SICL,clasp-developers/SICL,vtomole/SICL,clasp-developers/SICL,vtomole/SICL