mi:
        added miMPPointers array to mipointer.c
        added DeviceIntPtr to all miPointerSpriteFuncs. Coming from miPointer
        we use inputInfo.pointer as standard value. ABI BREAK!

ramdac:
        forcing failed HW Cursor initialisation. MPX needs software rendering.
        changes to use new miPointerSpriteFunc (this required externing
        inputInfo, should probably be fixed at a later point).

RAC: changes to use new miPointerSpriteFuncs.