Fixes recursion bug in disambiguate_in().

[ohcount] / test / gestalt_files / wpf / wpf.xaml

<Page
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  x:Class="MyNamespace.MyPageCode">
  <Button Click="ClickHandler" >Click Me!</Button>
</Page>