fixed bug in copy-readtable where source hashtables were cleared instead of destination hashtables
fixed bug in copy-readtable where source hashtables were cleared instead
of destination hashtables

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