fix error report to homechannel

rotbot.py

@@ -53,7 +53,7 @@ class PyRot(irc.bot.SingleServerIRCBot):
     
     def on_error(self, connection, event):
         log.notice(str(event))
-        connection.privmsg(self.homechannel, "ERROR: " + event)
+        connection.privmsg(self.homechannel, "ERROR: " + str(event))
     
     def on_nick(self, connection, event):
         events.on_nick.process_event(self, connection, event)