oleaut32/tests: added tests for negative fractional variant dates.

[Jeremy Drake]

Oops, those empty parens () were intended to cite the URL for the article.
Unfortunately, I can't seem to find it now.  However, I found an MSDN page
that describes the behavior I am testing here:
http://msdn.microsoft.com/en-us/library/system.datetime.fromoadate.aspx

This is actually documentation of a .NET method, but see the Remarks
section for a description of the format.

On Fri, 1 Oct 2010, Jeremy Drake wrote:

> I recently read an article () mentioning some of the oddities that show up
> in negative variant dates with non-zero (midnight) times, and I noticed
> that wine had no test coverage for these cases.  Until now.
>
>
>
> ---
>  dlls/oleaut32/tests/vartest.c |   32 +++++++++++++++++++++++---------
>  1 files changed, 23 insertions(+), 9 deletions(-)

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