From a9b265ff1b9e3c69d14659b27117ffeaf6b2d3f2 Mon Sep 17 00:00:00 2001
From: iceman1001 <iceman@iuse.se>
Date: Thu, 28 Jan 2021 12:16:02 +0100
Subject: [PATCH] cppcheck fixes call from hf_aveful with NULL

---
 armsrc/mifareutil.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/armsrc/mifareutil.c b/armsrc/mifareutil.c
index 07cf7b098..8fc747a97 100644
--- a/armsrc/mifareutil.c
+++ b/armsrc/mifareutil.c
@@ -68,9 +68,12 @@ uint8_t mf_crypto1_encrypt4bit(struct Crypto1State *pcs, uint8_t data) {
 
 // send X byte basic commands
 int mifare_sendcmd(uint8_t cmd, uint8_t *data, uint8_t data_size, uint8_t *answer, uint8_t *answer_parity, uint32_t *timing) {
+    
     uint8_t dcmd[data_size + 3];
     dcmd[0] = cmd;
-    memcpy(dcmd + 1, data, data_size);
+    if (data_size > 0)
+        memcpy(dcmd + 1, data, data_size);
+
     AddCrc14A(dcmd, data_size + 1);
     ReaderTransmit(dcmd, sizeof(dcmd), timing);
     int len = ReaderReceive(answer, answer_parity);