[PATCH v3 3/4] d3dx10: Handle format converting for D3DX10CreateTextureFromMemory.

[Matteo Bruni]

With the subject changed to "d3dx10: Handle format conversion in
D3DX10CreateTextureFromMemory()." or similar this is

Signed-off-by: Matteo Bruni <mbruni at codeweavers.com>
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If we had the shared d3dx stuff in place we would probably reuse the
surface conversion code from d3dx9 instead of leveraging WIC. I don't
see any harm in using WIC for the time being though (especially when
the alternative is to duplicate or reimplement format conversion).