res_pjsip_transport_websocket: Give transport a meaningful description

We were not \0 terminating this string, so any attempt to print it would
in the best case show an empty string and in the worst case potentially
crash.

Change-Id: I63d96ef8f7516ac02a0f91e22dfa8acdc615042c

res/res_pjsip_transport_websocket.c

@@ -203,6 +203,10 @@ static int transport_create(void *data)
 	ast_debug(4, "Creating websocket transport for %s:%s\n",
 		newtransport->transport.type_name, ws_addr_str);
 
+	newtransport->transport.info = (char *) pj_pool_alloc(newtransport->transport.pool,
+		strlen(newtransport->transport.type_name) + strlen(ws_addr_str) + sizeof(" to "));
+	sprintf(newtransport->transport.info, "%s to %s", newtransport->transport.type_name, ws_addr_str);
+
 	pj_sockaddr_parse(pj_AF_UNSPEC(), 0, pj_cstr(&buf, ws_addr_str), &newtransport->transport.key.rem_addr);
 	if (newtransport->transport.key.rem_addr.addr.sa_family == pj_AF_INET6()) {
 		newtransport->transport.key.type = transport_type_wss_ipv6;
@@ -218,8 +222,6 @@ static int transport_create(void *data)
 	newtransport->transport.local_name.port = ast_sockaddr_port(ast_websocket_local_address(newtransport->ws_session));
 
 	newtransport->transport.flag = pjsip_transport_get_flag_from_type((pjsip_transport_type_e)newtransport->transport.key.type);
-	newtransport->transport.info = (char *)pj_pool_alloc(newtransport->transport.pool, 64);
-
 	newtransport->transport.dir = PJSIP_TP_DIR_INCOMING;
 	newtransport->transport.tpmgr = tpmgr;
 	newtransport->transport.send_msg = &ws_send_msg;