PATCH RFA: Make hashtable::clear return quickly if table is empty

[Ian Lance Taylor]

Paolo Carlini <paolo.carlini@oracle.com> writes:

> PS: Careful, two more of those and you will be officially appointed
> maintainer of the unmaintained library code ;)

Fortunately I only have one more patch, which I will send shortly.

> PPS: A tad more seriously: we badly lack testcases in some areas, thus,
> in the future, please consider exercising a bit the code paths you will
> be touching...

I will include a test case with the next patch, which deserves one.

The last two patches were optimization tuning, really, so it didn't
occur to me to include test cases.

Ian