$NetBSD: patch-ab,v 1.5 2008/07/22 21:25:00 tonio Exp $

--- liblcdf/giftoc.c.orig	2003-08-29 05:58:00.000000000 +0200
+++ liblcdf/giftoc.c
@@ -192,9 +192,9 @@ or:    giftoc -makename [OPTIONS] FILE [
       sin = strrchr(file_name, PATHNAME_SEPARATOR) + 1;
       if (!sin) sin = file_name;
       sout = rec_name = (char *)fmalloc(strlen(sin) + 2);
-      if (isdigit(*sin)) *sout++ = 'N';
+      if (isdigit((unsigned char)*sin)) *sout++ = 'N';
       for (; *sin; sin++, sout++)
-	if (isalnum(*sin))
+	if (isalnum((unsigned char)*sin))
 	  *sout = *sin;
 	else
 	  *sout = '_';