From 380784817113fa52d00e13adf9ed06dc6a9b8da5 Mon Sep 17 00:00:00 2001
From: Philippe Teuwen <phil@teuwen.org>
Date: Tue, 12 Mar 2019 23:37:53 +0100
Subject: [PATCH] fix DetectNACKbug: sync_cycles is signed

---
 armsrc/iso14443a.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c
index a22a79390..023eb02f9 100644
--- a/armsrc/iso14443a.c
+++ b/armsrc/iso14443a.c
@@ -2747,7 +2747,7 @@ void DetectNACKbug() {
     bool received_nack;
 
     // Mifare Classic's random generator repeats every 2^16 cycles (and so do the nonces).
-    uint32_t sync_cycles = PRNG_SEQUENCE_LENGTH;
+    int32_t sync_cycles = PRNG_SEQUENCE_LENGTH;
 
     BigBuf_free();
     BigBuf_Clear_ext(false);