From 2a5774edca48ce535993b15e5c542e42cfc667c0 Mon Sep 17 00:00:00 2001
From: Andy Green <andy.green@linaro.org>
Date: Mon, 30 Mar 2015 18:56:52 +0800
Subject: [PATCH] unsigned char by default compiler compatibility

http://ml.libwebsockets.org/pipermail/libwebsockets/2015-March/001705.html

Signed-off-by: Andy Green <andy.green@linaro.org>
---
 lib/parsers.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/parsers.c b/lib/parsers.c
index 954eeaa4..b4f27a9c 100644
--- a/lib/parsers.c
+++ b/lib/parsers.c
@@ -164,7 +164,7 @@ int lws_hdr_simple_create(struct libwebsocket *wsi,
 	return 0;
 }
 
-static char char_to_hex(const char c)
+static signed char char_to_hex(const char c)
 {
 	if (c >= '0' && c <= '9')
 		return c - '0';