From 9e36d1bfe239e1eb428a083a5ea61ae1723e2ade Mon Sep 17 00:00:00 2001
From: Jonas Nick <jonasd.nick@gmail.com>
Date: Fri, 23 Mar 2018 13:57:16 +0000
Subject: [PATCH] Fix bug in wnaf_fixed where the wnaf array is not completely
 zeroed when given a 0 scalar.

---
 src/ecmult_impl.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/ecmult_impl.h b/src/ecmult_impl.h
index 71ab284741dfc..608d19b362e96 100644
--- a/src/ecmult_impl.h
+++ b/src/ecmult_impl.h
@@ -571,9 +571,8 @@ static int secp256k1_wnaf_fixed(int *wnaf, const secp256k1_scalar *s, int w) {
     const secp256k1_scalar *work = s;
 
     if (secp256k1_scalar_is_zero(s)) {
-        while (pos * w < WNAF_BITS) {
+        for (pos = 0; pos < WNAF_SIZE(w); pos++) {
             wnaf[pos] = 0;
-            ++pos;
         }
         return 0;
     }