[PATCH 5/5] wined3d: Move volume DXTn handling to apply_format_fixups.

[Henri Verbeet]

This fails the d3dx9_36 tests:
    ../../../tools/runtest -q -P wine -T ../../.. -M d3dx9_36.dll -p
d3dx9_36_test.exe.so texture && touch texture.ok
    ...
    texture.c:1778: Test failed:
D3DXCreateVolumeTextureFromFileInMemory returned 0x8876086c, expected
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