wined3d: Implement support for projective textures in ps 2.0 and later

[H. Verbeet]

On 23/03/07, Fabian Bieler <der.fabe at gmx.net> wrote:
> +#define D3DSI_TEXLD_PROJECTED 0x00010000
This should be called WINED3DSI_TEXLD_PROJECTED, and should be added
to wined3d_private_types.h, together with the other WINED3DSI defines.
Also, please add a comment that texldp always divides by the fourth
component.