Re: [PATCH 0/3] MR4888: wined3d: Avoid assuming the GL backend in (what can be) common code.

[Henri Verbeet (＠hverbeet)]

> This check was introduced in 4640be8dc834. At that point the only way for that condition to be false was for a cube map texture.

It reads to me like it's specifically checking for a 2D texture instead of "not a cube texture", but the distinction may be somewhat moot: WINED3D_CKEY_SRC_BLT implies ddraw, and that means we either have a cube texture or a 2D texture.

Note that constructs like
```c
    if (a)
    {
        if (b)
        {
            if (c)
            {
                [...]
            }
        }
    }
```
can often be rewritten as
```c
    if (a && b && c)
    {
        [...]
    }
```
without readability being reduced.