[PATCH] d3dx9: Correctly handle NULL constant state for objects on 64 bit arch.

[Piotr Caban]

Hi Matteo,

I've sent a fix for ntdll sprintf.

We should probably introduce ucrtbase headers at some point that provide 
inline sprintf function (or add sprintf to import lib). Fixing ntdll 
implementation should be good enough for now.

Cheers,
Piotr