[Ecls-list] Robustness problem in COPY-SYMBOL

[Eric Marsden]

Hi,

ECL aborts if the first argument to COPY-SYMBOL is not a symbol, but
should signal a type-error. 

,----
| > (copy-symbol "not a symbol")
| Internal or unrecoverable error in:
| not a lisp data object
| zsh: abort    ecl
`----

ECL compiled from CVS on Linux/AMD64.

-- 
Eric Marsden