MSVC: fix for failing tests due to strtod+hexadecimal literals

[Dan Olson via digitalmars-d-ldc]

On Tuesday, 3 March 2015 at 21:14:47 UTC, Johan Engelen wrote:
> Also, where do I add tests for this?
> I could add a .d test file, where correct parsing of hex float 
> literals are tested against binary representations.

Could David Gay's strtod() be used?
http://www.exploringbinary.com/how-strtod-works-and-sometimes-doesnt/