[m-dev.] trivial diff: fix a bug in the debugger

[Thomas Conway]

On Fri, Jul 23, 1999 at 10:17:26AM EST, Zoltan Somogyi wrote:
> 
> Estimated hours taken: 0.1
> 
> trace/mercury_trace_vars.c:
> 	Fix a bug: if you try to print a nonexistent named variable,
> 	return an error message.
> 
> tests/debugger/debugger_regs.{inp,exp}:
> 	Test for this fix.
> 

Looks fine.

-- 
 Thomas Conway )O+     Every sword has two edges.
     Mercurian            <conway at cs.mu.oz.au>
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