[tcltk-perl] $widget->exists

[Gisle A. <gi...@Ac...>]

The following change:

             * lib/Tcl/Tk.pm: perlTk compatibility: sub PathName,
             Exists, class, toplevel, parent, *all* winfo methods.

broke our app, because we used $bwtree->exists($path) to access the
".tree exists path" subcommand of BWTree.  After this change this
method call was routed to winfo instead.  I fixed it in our sources be
removing the winfo override for exists.  I suggest we make that
official too.  There is already Tcl::Tk::Exists() for doing 'winfo
exists' checks.

Anyway, this illustrates that we need a better mechanism to deal with
conflicts like this.  There should be a way for force method calls to
resolve a particular way.

--Gisle