From 6225a5684ea1eb8b94dd1358e1f3c23ff2a3dcf8 Mon Sep 17 00:00:00 2001
From: Manuel Bl <10954524+manuelbl@users.noreply.github.com>
Date: Mon, 7 Oct 2019 23:31:09 +0200
Subject: [PATCH] unsigned type for length

---
 src/lmic/lmic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lmic/lmic.c b/src/lmic/lmic.c
index 1202a494..7a1beecf 100644
--- a/src/lmic/lmic.c
+++ b/src/lmic/lmic.c
@@ -1872,7 +1872,7 @@ static bit_t buildDataFrame (void) {
         LMIC.adrChanged = 0;
     }
 
-    int flen = end + (txdata ? 5+dlen : 4);
+    unsigned int flen = end + (txdata ? 5+dlen : 4);
     if( flen > MAX_LEN_FRAME ) {
         // Options and payload too big - delay payload
         txdata = 0;