Change listen(0) to listen(1) for Solaris 2 sockets

Demo/sockets/echosvr.py

@@ -19,7 +19,7 @@ def main():
 		port = ECHO_PORT
 	s = socket(AF_INET, SOCK_STREAM)
 	s.bind('', port)
-	s.listen(0)
+	s.listen(1)
 	conn, (remotehost, remoteport) = s.accept()
 	print 'connected by', remotehost, remoteport
 	while 1: