[emacs-wiki-discuss] Problem when emacs-wiki-change-project

[Sun Yijiang]

In emacs-wiki-project.el, function `emacs-wiki-change-project' uses
this to visit default page in the new project:
(with-emacs-wiki-project project
   (emacs-wiki-visit-link emacs-wiki-default-page))
This causes error when target project has no default wiki page, I
think we should use `emacs-wiki-find-file' instead:
(with-emacs-wiki-project project
  (emacs-wiki-find-file emacs-wiki-default-page))