d3d9: update locked_rect only if wined3d_surface_map succeeded

[Henri Verbeet]

On 3 October 2013 21:16, Lasse Rasinen <lrasinen at iki.fi> wrote:
> According to debugging output, Artemis Spaceship Bridge Simulator 2.0
> calls LockRect twice on the same texture (for whatever reason) and crashes.
>
> http://bugs.winehq.org/show_bug.cgi?id=34271
>
> This change prevents the locked_rect being overwritten with garbage in
> that case, and the game no longer crashes.
>
I think this patch makes sense, but could you please add a test case
as well? Ideally we'd also have similar tests for other resources
(i.e., textures, volumes, vertex buffers, index buffers) and D3D
versions (ddraw, d3d8), but that's not a strict requirement.

> +    if (hr == WINED3D_OK) {
> +        locked_rect->Pitch = map_desc.row_pitch;
> +        locked_rect->pBits = map_desc.data;
> +    }
>
Minor style issue, this should be:

    if (SUCCEEDED(hr))
    {
        ...
    }