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$NetBSD: patch-ah,v 1.2 1999/07/13 00:56:13 jlam Exp $
--- chardefs.h.orig Thu Sep 25 10:59:00 1997
+++ chardefs.h Tue Jul 6 05:18:58 1999
@@ -51,7 +51,7 @@
#define meta_character_bit 0x080 /* x0000000, must be on. */
#define largest_char 255 /* Largest character value. */
-#define CTRL_CHAR(c) ((c) < control_character_threshold && (c) >= 0)
+#define CTRL_CHAR(c) (((unsigned)(c)) < control_character_threshold)
#define META_CHAR(c) ((c) > meta_character_threshold && (c) <= largest_char)
#define CTRL(c) ((c) & control_character_mask)
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