Small sanity patch

[Loren James Rittle]

> I found a little buglet that emitted warnings with high warning levels in
> the test suite of libstdc++-v3 that this patch addresses.

> I think it would qualify as obvious, should that not be the case then I
> have to supply the assignment forms.

Agreed on all counts, committed to mainline as:

2003-03-21  Magnus Fromreide  <gnats@magfr.user.lysator.liu.se>

	* testsuite/testsuite_hooks.h: Fix warning nits.

Thanks, Loren