Fixed bug with empty [] in command.

src/callbacks.py

@@ -259,6 +259,9 @@ class IrcObjectProxy:
     "A proxy object to allow proper nested of commands (even threaded ones)."
     def __init__(self, irc, msg, args):
         #debug.printf('__init__: %s' % args)
+        if not args:
+            irc.reply(msg, '[]')
+        else:
             self.irc = irc
             self.msg = msg
             self.args = args