[AD] Patch to remove requirements of old DirectX header files

[David Capello <davidcapello@xxxxxxxxxx>]

The attached patch for Allegro 4.4 branch eliminates the need
of old DirectX header files. DirectInputCreate is replaced with
CoCreateInstance and IDirectInput_Initialize.

See remarks section of DirectInputCreate documentation::
http://msdn.microsoft.com/en-us/library/ms886964.aspx

Also a FindDDraw.cmake was added to find ddraw library.

Attachment: alleg-directx.patch
Description: Binary data