dinput.lib on Windows

[Chambers]

It appears that in the latest DirectX SDK's, dinput.lib has been renamed dinput8.lib.

This causes builds to break when using a new SDK, due to the pragma in display.h.

[Magnus Norddahl]

Hmm that's a problem. Luckily it seems dinput8.lib also exists in my August 2006 edition, so maybe the solution is simply to just always link with dinput8.lib instead. :)