html: fix handling of null byte

A return value of `len` or more means that the output was truncated.

Signed-off-by: Peter Prohaska <pitrp@web.de>
Signed-off-by: Christian Hesse <mail@eworm.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/html.c b/html.c
index 7f81965..0bac34b 100644
--- a/html.c
+++ b/html.c
@@ -59,7 +59,7 @@ char *fmt(const char *format, ...)
         va_start(args, format);
         len = vsnprintf(buf[bufidx], sizeof(buf[bufidx]), format, args);
         va_end(args);
-        if (len > sizeof(buf[bufidx])) {
+        if (len >= sizeof(buf[bufidx])) {
                 fprintf(stderr, "[html.c] string truncated: %s\n", format);
                 exit(1);
         }