From 7ddd614cd3fff056ff037abda99e95d9edbf884e Mon Sep 17 00:00:00 2001
From: Jilles Tjoelker <jilles@stack.nl>
Date: Wed, 14 Aug 2013 23:49:22 +0200
Subject: [PATCH] Ensure consistent indexing into user_modes independent on
 signedness of char.

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

diff --git a/src/supported.c b/src/supported.c
index 24c1e3ed..8133d548 100644
--- a/src/supported.c
+++ b/src/supported.c
@@ -230,7 +230,8 @@ isupport_umode(const void *ptr)
 	const char *str;
 
 	str = ptr;
-	return ConfigFileEntry.oper_only_umodes & user_modes[*str] ? NULL : str;
+	return ConfigFileEntry.oper_only_umodes &
+		user_modes[(unsigned char)*str] ? NULL : str;
 }
 
 static const char *