VTT typo

[Mark Mitchell]

  Virtual VTTs: The sub-VTTs for each virtual subobject in inheritance
  graph preorder), i.e. the sub-VTT for virtual base W of virtual base
  V of D comes before the sub-VTT for V.

That's not preorder.  Preorder is derived-before-base, i.e., V before
W.  I think we agreed on preorder so that sentence needs changing.

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Mark Mitchell                   mark at codesourcery.com
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