bug#54038: 29.0.50; doc-view cannot show different pages in different tabs

[martin rudalics]

> Maybe a more immediate solution would be simply to iterate all tabs
> on all frames, and to check whether they contain a window.  But still
> I can't find a function to check whether a window is in a window 
configuration.
> Does such a function exist?

No.  The only agent that has access to all window configurations is the
garbage collector.  Do you want to collect garbage each time you want to
know whether a window is part of a window configuration?

martin