#416 In case D3D_DISABLE_9EX is defined code can't be compiled

[Miodrag Milanovic]

Here is modified d3d9.h (used one from release of 4.8.3 as reference) enabling compilation when D3D_DISABLE_9EX is defined

[Jacek Caban]

We import this file from the Wine project (www.winehq.org). Please send a patch to Wine.