Fix fmt() off-by-one error

vsnprintf returns the byte count of the formatted output not including
the null terminator, so in the case that len == 1024 the last character
of the output was being truncated and not detected by the later check.
Changing the greater than comparison to greater than or equal fixes this
edge case.

1 files changed, 1 insertions, 1 deletions

@@ -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);
         }