Bogus warning from assert

[John W. Eaton]

On  9-Apr-2008, David Bateman wrote:

| The inclusion of warnings in the deprecated functions now means that the 
| first time assert is used it prints a warning. The reason is that the 
| code currently supports the use of lists for the cond and expected 
| arguments.. I'd suggest just removing this functionality as in the 
| attached patch.

OK, I applied the patch.

Thanks,

jwe