From: nOOb3167 <nOOb3167@gmail.com>
Date: Fri, 22 Dec 2017 10:33:46 +0000 (+0100)
Subject: Fix undefined behaviour on getting pointer to data in empty vector
X-Git-Tag: 5.0.0~672
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=7354d0f3d8ea2d48a85479426bf0c055ff4926b4;p=oweals%2Fminetest.git

Fix undefined behaviour on getting pointer to data in empty vector

`&vector[0]` is undefined if vector.empty(), causing build failure on MSVC
---

diff --git a/src/network/networkpacket.cpp b/src/network/networkpacket.cpp
index 14b1ac440..530f0fe70 100644
--- a/src/network/networkpacket.cpp
+++ b/src/network/networkpacket.cpp
@@ -63,7 +63,7 @@ void NetworkPacket::putRawPacket(u8 *data, u32 datasize, session_t peer_id)
 
 	// split command and datas
 	m_command = readU16(&data[0]);
-	memcpy(&m_data[0], &data[2], m_datasize);
+	memcpy(m_data.data(), &data[2], m_datasize);
 }
 
 const char* NetworkPacket::getString(u32 from_offset)