[Bug 48302] Warhammer Online doesn't render without d3dx9_34

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=48302

--- Comment #7 from Paul Gofman <gofmanp at gmail.com> ---
Created attachment 66075
  --> https://bugs.winehq.org/attachment.cgi?id=66075
d3dx9: Use compatibility flag for shader compilation.

Back to the original issue with builtin d3dx9_34, the problem is in shaders
compilation which the game wants to compile with D3DXCompileShader(). Even with
native d3dcompiler_47 overrides the shaders do not compile due to the following
error returned from native compiler:

error X3025: global variables are implicitly constant, enable compatibility
mode to allow modification

The attached patch fixes the issue with builtin d3dx9 (native d3dcompiler_47
overrides is still needed). This could of course use some tests to get an idea
of which versions of d3dx9 support this old HLSL.

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