Fix signalreceiver crashing on daemon switch.

Fix exception on shutdown in signalreceiver.

deluge/ui/gtkui/signals.py

@@ -45,7 +45,7 @@ class Signals(component.Component):
         if not client.is_localhost():
             self.receiver.set_remote(True)
 
-        self.receiver.start()
+        self.receiver.run()
         self.receiver.connect_to_signal("torrent_added", 
             self.torrent_added_signal)
         self.receiver.connect_to_signal("torrent_removed", 

deluge/ui/signalreceiver.py

@@ -46,21 +46,16 @@ import threading
 from deluge.log import LOG as log
 
 class SignalReceiver(
-        threading.Thread, 
         ThreadingMixIn, 
         SimpleXMLRPCServer.SimpleXMLRPCServer):
     
     def __init__(self):
         log.debug("SignalReceiver init..")
         gobject.threads_init()
-        threading.Thread.__init__(self)
     
         # Set to true so that the receiver thread will exit
         self._shutdown = False
 
-        # Daemonize the thread so it exits when the main program does
-        self.setDaemon(True)
-
         self.signals = {}
     
         self.remote = False
@@ -125,7 +120,6 @@ class SignalReceiver(
         while not self._shutdown:
             self.handle_request()
         self._shutdown = False
-        self.server_close()
             
     def emit_signal(self, signal, *data):
         """Exported method used by the core to emit a signal to the client"""