[PATCH xserver] present: Handle event mask updates as specified

[Keith Packard]

Michel Dänzer <michel at daenzer.net> writes:


> Thanks, I incorporated almost all your changes in v2, with the exception
> of not calling LEGAL_NEW_RESOURCE if mask == 0, due to this spec language:
>
>  If eventContext is an unused XID, then if eventMask is empty
>  no operation is performed.

Sounds good. I just read this the other way, but I don't think it
matters (which is to say, that if eventContext is not an unused XID then
it would return an error).

-- 
-keith
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