lnbase: initialize loop variable in main

lib/lnbase.py

@@ -415,5 +415,6 @@ if __name__ == "__main__":
     port = int(port)
     privkey = b"\x21"*32 + b"\x01"
     peer = Peer(privkey, host, port, pubkey)
+    loop = asyncio.get_event_loop()
     loop.run_until_complete(peer.main_loop())
     loop.close()