[winmm] Implement stub for midiConnect and midiDisconnect.

[Christian Costa]

I did some more testing and returning an error seems ok.
I will send an updated patch.

Nikolay Sivov a écrit :
> Christian Costa wrote:
>   
>> Hi,
>>
>> This fixes bug 11142 & 11182.
>>
>> Bye,
>> Christian
>>
>> Changelog:
>> Implement stub for midiConnect and midiDisconnect.
>>
>>     
> Usually some error code returned for plain stubs like these. Does it 
> block these bugs?
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