From 5d1c87b26f2e42430a66081b58580a075cadadf0 Mon Sep 17 00:00:00 2001
From: Tiiffi <tiiffi@gmail.com>
Date: Wed, 4 Dec 2024 08:17:56 +0200
Subject: [PATCH] Don't call memcpy() if there is nothing to copy

---
 mcrcon.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mcrcon.c b/mcrcon.c
index 280d534..944019d 100644
--- a/mcrcon.c
+++ b/mcrcon.c
@@ -547,7 +547,7 @@ rc_packet *packet_build(int id, int cmd, char s[static 1])
 	packet.size = sizeof packet.id + sizeof packet.cmd + len + 2;
 	packet.id = id;
 	packet.cmd = cmd;
-	memcpy(packet.data, s, len);
+	if (packet.size > 0) memcpy(packet.data, s, len);
 	packet.data[len] = 0;
 	packet.data[len + 1] = 0;