[check_postgres] check_postgres_query_time - Getting "invalid query returned" more often now

[Glyn Astill]

> > I added in the 3 lines, however no extra error was
> displayed. I was
> > wondering if it could be that this query sometimes
> returns -0 ?
> 
> Bingo! It doesn't explain why we are not getting better
> error messages,
> but it definitely would cause the action to fail. I just
> committed a
> change to handle such numbers properly, and rolled it out
> as version 2.3.3.

Excellent that's stopped the check flapping, thanks!