Fix a potential macro expansion problem... isspace can be

a macro causing a double decrement...

diff --git a/coreutils/cal.c b/coreutils/cal.c
index f6578bf..3ccd3ff 100644 (file)
--- 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;