dinput header fixes

[Robert Reif]

Alexandre Julliard wrote:

>Robert Reif <reif at earthlink.net> writes:
>
>  
>
>>Add some more version checks.
>>    
>>
>
>As a rule we avoid such version checks in Wine, they are not necessary
>and will only cause trouble since we compile our code with the same
>headers. I know there are some similar checks in there already but
>they should probably be removed.
>
>  
>
I agree it doesn't help wine much but it could make a big difference for
winelib applications ported to/from windows.  It's a pain to maintain
but I think it will be worth in in the long run.