d3dx9 [patch 1 / 3]: Avoid useless computations in D3DXMatrixAffineTransformation2D

[Rico Schüller]

On 05.05.2013 23:00, Nozomi Kodama wrote:
> +    FLOAT tmp1, tmp2;
>
> +    tmp1 = cosf(rotation);
> +    tmp2 = sinf(rotation);
>

As of it is really clear what's in those variables, we may name them 
with a better name instead of tmp1/tmp2 ... but I'm fine with either 
version.

Cheers
Rico