From d851554ebe68abc540a45796767fc016a786b0c0 Mon Sep 17 00:00:00 2001
From: Enno Rehling <enno.rehling@gmail.com>
Date: Mon, 6 Feb 2017 18:16:34 +0100
Subject: [PATCH] MSVC doesn't like to do integer->char conversions.

---
 src/kernel/race.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/kernel/race.c b/src/kernel/race.c
index c57d98a24..c7c2e8165 100644
--- a/src/kernel/race.c
+++ b/src/kernel/race.c
@@ -94,7 +94,8 @@ enum {
     RCO_TRADEHERB,
 };
 
-static void rc_setoption(race *rc, int key, const char *value) {
+static void rc_setoption(race *rc, int k, const char *value) {
+    unsigned char key = (unsigned char)k;
     int i;
     variant *v = NULL;
     if (!rc->options) {