[PATCH v3 2/4] d3dx10: Implement D3DX10CreateTextureFromMemory initially.

[Matteo Bruni]

With the patch subject changed to: "d3dx10: Introduce initial
D3DX10CreateTextureFromMemory() implementation." this is

Signed-off-by: Matteo Bruni <mbruni at codeweavers.com>