Fix og_forum function signature

I am doing a clean install using the latest modules of everything.

og2list fails to download & post incoming messages on cron run, throwing a fatal error into PHP log, saying the function og_forum_get_forum is not found. Indeed the correct og_forum function that returns taxonomy is og_forum_get_forum_container.

Solution: replace line 568 in og2list.module (in og2list_process_mail) with this:

          $node->taxonomy[] = og_forum_get_forum_container($oid);

This has been tested and works.