[Xcb] add support for using events as part of requests

[Christian Linhart]

Hi all,

I have added a new xml-element called "eventstruct".

This makes it possible to use events as part of requests.

This is, e.g., needed by the SendExtensionEvent request
of the XINPUT extension.

In this thread, I'll post the patches for that.

There is a testcase attached to this email.

Chris


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