$NetBSD: patch-server_net.c__tmp,v 1.1 2019/12/19 22:14:46 joerg Exp $

--- server/net.c_tmp.orig	2019-12-19 20:56:09.046271448 +0000
+++ server/net.c_tmp
@@ -1041,7 +1041,7 @@ static char * http_get(char * host, int 
 
                         checkedCode = 1;
                         start = headers;
-                        while (!isspace(*start) && *start)
+                        while (!isspace((unsigned char)*start) && *start)
                                 start++;
                         if (!*start) {
                                 close(sock);
@@ -1051,7 +1051,7 @@ static char * http_get(char * host, int 
                         start++;
 
                         end = start;
-                        while (!isspace(*end) && *end)
+                        while (!isspace((unsigned char)*end) && *end)
                                 end++;
                         if (!*end) {
                                 close(sock);