[PULL] two xibarrier fixes

[Keith Packard]

Peter Hutterer <peter.hutterer at who-t.net> writes:

>       xibarriers: Remove accidental use of the comma operator
>       xibarriers: Reset dt on barrier leave

I've merged the first and then applied the second version of the other.
   8f4640b..dd4ab8b  master -> master

-- 
keith.packard at intel.com
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