Change logging of sockets that discovery packets is sent on, due to E…

…xception on Windows. Fixes #445.

soco/discovery.py

@@ -119,8 +119,11 @@ def create_socket(interface_addr=None):
                              address, e.__class__.__name__, e)
         # Add a socket using the system default address
         _sockets.append(create_socket())
-        _LOG.info("Sending discovery packets on %s",
-                  list(s.getsockname()[0] for s in _sockets))
+        # Used to be logged as:
+        # list(s.getsockname()[0] for s in _sockets)
+        # but getsockname fails on Windows with unconnected unbound sockets
+        # https://bugs.python.org/issue1049
+        _LOG.info("Sending discovery packets on %s", _sockets)
 
     for _ in range(0, 3):
         # Send a few times to each socket. UDP is unreliable