From 30062d409dcc3ec19024e0a10f9fca84c581855f Mon Sep 17 00:00:00 2001
From: Thomas Wolff <towo@towo.net>
Date: Sat, 12 Jan 2019 11:57:59 +0100
Subject: [PATCH] map WEOF to undefined rather than the control char category

Fixes https://cygwin.com/ml/cygwin/2018-12/msg00173.html
---
 newlib/libc/ctype/categories.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/newlib/libc/ctype/categories.c b/newlib/libc/ctype/categories.c
index 85328ef2e..a8de1f129 100644
--- a/newlib/libc/ctype/categories.c
+++ b/newlib/libc/ctype/categories.c
@@ -19,7 +19,7 @@ bisearch_cat(wint_t ucs, const struct _category *table, int max)
   int mid;
 
   if (ucs < table[0].first || ucs > table[max].first + table[max].delta)
-    return 0;
+    return -1;
   while (max >= min)
     {
       mid = (min + max) / 2;