From 7e78cdddc8a2d6446659ee2ceef45bfeea0a8285 Mon Sep 17 00:00:00 2001
From: Michael Brown <mcb30@ipxe.org>
Date: Sat, 12 Mar 2016 18:06:47 +0000
Subject: [PATCH] [3c595] Fix compilation when "char" is unsigned by default

Signed-off-by: Michael Brown <mcb30@ipxe.org>
---
 src/drivers/net/3c595.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/drivers/net/3c595.c b/src/drivers/net/3c595.c
index 2338c54b7..92d38cfc5 100644
--- a/src/drivers/net/3c595.c
+++ b/src/drivers/net/3c595.c
@@ -391,7 +391,7 @@ vxsetlink(void)
 {       
     int i, j;
     char *reason, *warning;
-    static char prev_conn = -1;
+    static signed char prev_conn = -1;
 
     if (prev_conn == -1) {
         prev_conn = vx_connector;