ddraw/tests: Correct test condition (PVS-Studio)

[Nikolay Sivov]

>      rc = IDirectDrawSurface_GetSurfaceDesc(lpDst, &ddsd3);
>      ok(rc == DD_OK, "IDirectDrawSurface_GetSurfaceDesc between a lock/unlock pair returned %08x\n", rc);
> -    ok(ddsd3.lpSurface == ddsd3.lpSurface, "lpSurface from GetSurfaceDesc(%p) differs from the one returned by Lock(%p)\n", ddsd3.lpSurface, ddsd2.lpSurface);
> +    ok(ddsd3.lpSurface == ddsd2.lpSurface, "lpSurface from GetSurfaceDesc(%p) differs from the one returned by Lock(%p)\n", ddsd3.lpSurface, ddsd2.lpSurface);


So I guess it means test is incorrect, and implementation too.