From 979e9a9d1542d2e59638889eeca52357eeac6c6d Mon Sep 17 00:00:00 2001
From: Karel Miko <karel.miko@gmail.com>
Date: Fri, 15 Jan 2016 08:56:32 +0100
Subject: [PATCH] fix for #90 ltc_ecc_mul2add.c integer sign issue (sjaeckel's
 way)

---
 src/pk/ecc/ltc_ecc_mul2add.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/pk/ecc/ltc_ecc_mul2add.c b/src/pk/ecc/ltc_ecc_mul2add.c
index a6d1aab..de4aac3 100644
--- a/src/pk/ecc/ltc_ecc_mul2add.c
+++ b/src/pk/ecc/ltc_ecc_mul2add.c
@@ -134,13 +134,14 @@ int ltc_ecc_mul2add(ecc_point *A, void *kA,
   bitbufB = tB[0];
 
   /* for every byte of the multiplicands */
-  for (x = -1;; ) {
+  for (x = 0;; ) {
      /* grab a nibble */
      if (++nibble == 4) {
-        ++x; if (x == len) break;
+        if (x == len) break;
         bitbufA = tA[x];
         bitbufB = tB[x];
         nibble  = 0;
+        ++x;
      }
 
      /* extract two bits from both, shift/update */