Dx9 depal - needs debugging before merge

Pretty much the same as GL ES 2.0 depalettization.

Doesn't work yet though, hope someone else can spot what's wrong.
"D3DFVF_TEX0" means "I have 0 texture coordinates in the vertices", I think this ought to be D3DFVF_TEX1.  I still don't think that will fix it.

-[Unknown]