Added environment argument to VAR-TO-LEXICAL-LOCATION.
Added environment argument to VAR-TO-LEXICAL-LOCATION.

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