d3dx9_26: Add custom ID3DXEffect interface.

[Erich Hoover]

On Wed, Sep 28, 2011 at 2:45 PM, Alexandre Julliard <julliard at winehq.org> wrote:
> ...
> In general it's better to have the individual dlls handle their own
> differences, instead of requiring d3dx9_36 to handle all the quirks of
> 20 different versions.

It sounded like we were only talking about some functions not existing
on older versions, but if that's not the case then I would definitely
agree.

Erich Hoover
ehoover at mines.edu