isspace(3) requires an unsigned argument;

bug reported by Thomas Klausner <wiz at NetBSD>

diff --git a/soelim.c b/soelim.c
index 3ef30820e318a9a5fbabe6a0a6b43943c7441df6..33d60e4588266a42a0809aa64b626dbb3ca912f6 100644 (file)
--- a/soelim.c
+++ b/soelim.c
@@ -1,4 +1,4 @@
-/*     $Id: soelim.c,v 1.5 2015/11/07 14:22:29 schwarze Exp $  */
+/*     $Id: soelim.c,v 1.6 2021/09/19 18:14:24 schwarze Exp $  */
 /*
  * Copyright (c) 2014 Baptiste Daroussin <bapt@FreeBSD.org>
  * All rights reserved.
@@ -104,16 +104,16 @@ soelim_file(FILE *f, int flag)
                }
 
                walk = line + 3;
-               if (!isspace(*walk) && ((flag & C_OPTION) == 0)) {
+               if (!isspace((unsigned char)*walk) && (flag & C_OPTION) == 0) {
                        printf("%s", line);
                        continue;
                }
 
-               while (isspace(*walk))
+               while (isspace((unsigned char)*walk))
                        walk++;
 
                cp = walk;
-               while (*cp != '\0' && !isspace(*cp))
+               while (*cp != '\0' && !isspace((unsigned char)*cp))
                        cp++;
                *cp = 0;
                if (cp < line + linelen)