Patch for circuits.core.managers.Manager.getHandlers(...)

diff --git a/circuits/core/manager.py b/circuits/core/manager.py
--- a/circuits/core/manager.py
+++ b/circuits/core/manager.py
@@ -249,7 +249,7 @@
         handlers_chain.append(self._handlers.get(name, []))

         for _handler in chain(*handlers_chain):
-            handler_channel = _handler.channel or getattr(
+            handler_channel = _handler.channel is not None or getattr(
                 getattr(
                     _handler, "im_self", getattr(
                         _handler, "__self__", _dummy