iq2000 warning fix

[Nick Clifton]

Hi Alan,

> This is an obvious patch to fix a warning, and of course needs applying
> to the /src/cpu/ dir as well.  It seems like /src/cpu/ is now supposed
> to be the master, but I see the /src/cgen/cpu/ "copy" differs quite a
> bit..  What's the story?

I suspect that what has happened is that patches have been checked in to 
/src/cpu without being checked in to /src/cgen/cpu.

I think that what we need is a way to mark files in /src/cgen/cpu as 
obsolete and/or replace them with links to the master copies in /src/cpu.

Cheers
   Nick