Services: catch occasional error when removing waiting joins from list

Signed-off-by: James McCoy <jamessan@users.sourceforge.net>

plugins/Services/plugin.py

@@ -319,7 +319,10 @@ class Services(callbacks.Plugin):
                 for netname, m in tmp_wj:
                     if netname == irc.network:
                         irc.sendMsg(m)
-                        self.waitingJoins.remove((netname, m,))
+                        try:
+                            self.waitingJoins.remove((netname, m,))
+                        except ValueError:
+                            pass # weird stuff happen sometimes
         elif 'not yet authenticated' in s:
             # zirc.org has this, it requires an auth code.
             email = s.split()[-1]