From b0fd2b06a32a0a8a70a65e1cacf70104afc83faa Mon Sep 17 00:00:00 2001
From: Eric Andersen <andersen@codepoet.org>
Date: Sat, 15 Jun 2002 14:37:46 +0000
Subject: [PATCH] Fix a potential macro expansion problem...  isspace can be a
 macro causing a double decrement...

---
 coreutils/cal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/coreutils/cal.c b/coreutils/cal.c
index f6578bf43..3ccd3fff5 100644
--- a/coreutils/cal.c
+++ b/coreutils/cal.c
@@ -372,7 +372,7 @@ void trim_trailing_spaces(char *s)
 
 	for (p = s; *p; ++p)
 		continue;
-	while (p > s && isspace(*--p))
+	while (p > s && (--p, isspace(*p)))
 		continue;
 	if (p > s)
 		++p;