bankd: Add client.id to bankd_worker

Change-Id: I1461f626b579d92621df21b53bbbe8062fb97d72
diff --git a/src/bankd.h b/src/bankd.h
index bf976d0..e97b702 100644
--- a/src/bankd.h
+++ b/src/bankd.h
@@ -103,6 +103,7 @@
 		int fd;
 		struct sockaddr_storage peer_addr;
 		socklen_t peer_addr_len;
+		unsigned int id;
 	} client;
 
 	struct {