From 6b53a820a3ef3258780756376c22d3e008a29a6a Mon Sep 17 00:00:00 2001
From: Volker Birk <vb@pep-project.org>
Date: Mon, 20 Dec 2021 14:26:48 +0100
Subject: [PATCH] FIX: .size() has type size_t

---
 src/std_utils.hxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/std_utils.hxx b/src/std_utils.hxx
index fb21076..de6779c 100644
--- a/src/std_utils.hxx
+++ b/src/std_utils.hxx
@@ -68,7 +68,7 @@ namespace pEp {
             if ((hex_str.size() % 2) != 0) {
                 throw std::runtime_error("hex2bin: Invalid hex string: must be even length");
             }
-            for (int i = 0; i < hex_str.size(); i += 2) {
+            for (size_t i = 0; i < hex_str.size(); i += 2) {
                 std::ostringstream val_hex{};
                 val_hex << hex_str.at(i);
                 val_hex << hex_str.at(i + 1);