From a11c76c59a431e3492994f71a968a838e398fb58 Mon Sep 17 00:00:00 2001
From: Mustapha Abiola <mustapha@trilemma.net>
Date: Sun, 14 Jul 2019 17:02:58 +0200
Subject: [PATCH] secp256k1/src/tests.c:  Properly handle sscanf return value

This pull request fixes a bug which allows the `sh` variable to be used uninitialized when sscanf returns EOF.

Signed-off-by: Mustapha Abiola <mustapha@trilemma.net>
---
 src/tests.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/tests.c b/src/tests.c
index 132df9ba9c..cab3bcfb70 100644
--- a/src/tests.c
+++ b/src/tests.c
@@ -5180,7 +5180,7 @@ int main(int argc, char **argv) {
         const char* ch = argv[2];
         while (pos < 16 && ch[0] != 0 && ch[1] != 0) {
             unsigned short sh;
-            if (sscanf(ch, "%2hx", &sh)) {
+            if ((sscanf(ch, "%2hx", &sh)) == 1) {
                 seed16[pos] = sh;
             } else {
                 break;