Fix fallback irc notifications

Correcting a regression with the earlier change...

  Traceback (most recent call last):
    File "/srv/doctor.torproject.org/doctor/fallback_directories.py", line 92, in <module>
      main()
    File "/srv/doctor.torproject.org/doctor/fallback_directories.py", line 87, in main
      util.send('Announce or', body = body, to = ['tor-misc@commit.noreply.org'])
  NameError: global name 'body' is not defined

fallback_directories.py

@@ -84,7 +84,7 @@ def main():
         break
 
     irc_body = '\n'.join(['[fallback-directories] %s' % line for line in irc_lines])
-    util.send('Announce or', body = body, to = ['tor-misc@commit.noreply.org'])
+    util.send('Announce or', body = irc_body, to = ['tor-misc@commit.noreply.org'])
 
 
 if __name__ == '__main__':