Fixed wrong use of ensureOneVisit in the generated XML visitor: it made no sense the way it was implemented.
Fixed wrong use of ensureOneVisit in the generated XML visitor: it
made no sense the way it was implemented.

Stopped using xassertdb() for the ensureOneVisit in the generated
DelegatorVisitor; instead use xassert but don't check if
ensureOneVisit is off.


angavrilov/olmar,angavrilov/olmar,angavrilov/olmar,angavrilov/olmar