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

[James McKenzie]

  On 10/2/10 10:13 AM,  (Marvin) wrote:
> Hi,
>
> While running your changed tests on Windows, I think I found new failures.
> Being a bot and all I'm not very good at pattern recognition, so I might be
> wrong, but could you please double-check?
> Full results can be found at
> http://testbot.winehq.org/JobDetails.pl?Key=5729
>
> Your paranoid android.
>
>
> === W98SE (32 bit vartest) ===
> vartest.c:1685: Test failed: expected 0, -5.99998846, got 0, -5.999988425925926
Looks like you got 'bit' by the way that a finite storage method mangles 
floating information.  There was a lengthy discussion on how to 
'overcome' this on the Wine-Development list a short while ago.

Maybe Dan Kegel can step in and refresh this.

James McKenzie