Added anther test for WITH clause with NIL variable in destructuring.
Added anther test for WITH clause with NIL variable in destructuring.

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