wined3d: Use higher precision to convert floats into text.

[Vitaliy Margolen]

Stefan Dösinger wrote:
> Am Dienstag, 27. Mai 2008 14:57:49 schrieb Vitaliy Margolen:
>> Whatever you want to do - I'd like to see this bug fixed before the next
>> version is out. All the discussions about "possible options" doesn't get it
>> anywhere.
> I'll see what I can do. Unfortunately I am quite busy, but I guess in the time 
> spent discussing this bug I could have written a bugfix as well

Thank you for looking into this.

Vitaliy.