#119 discuss on a wiki page produces no forum indicated error

[Hans Saelens]

I enabled the discuss pages on forums option, and
entered a forum name in the wiki settings. Now, on some
wiki pages, when I press the discuss button, the
discussion forum is opened, and on some wiki pages I
get the following error:

Error
No forum indicated
Go back
Return to home page

The problem only occurs if a topic for the wiki page
already exists in the forum. The problem was caused by
tiki-view_forum.php calling tiki-view_forum_thread.php
with wrong parameter syntax.

I will not put this on cvs myself, because I'm not sure
if this is a good fix in all cases... It works for my
setup however...

[Hans Saelens]

Diff file for tiki-view_forum.php