Plug memory leak in ntpd(8)

[Michael McConville]

Found with the Clang static analyzer.


Index: constraint.c
===================================================================
RCS file: /cvs/src/usr.sbin/ntpd/constraint.c,v
retrieving revision 1.14
diff -u -p -r1.14 constraint.c
--- constraint.c        18 Jul 2015 21:50:47 -0000      1.14
+++ constraint.c        9 Sep 2015 14:39:36 -0000
@@ -768,6 +768,7 @@ tls_readline(struct tls *tls, size_t *le
 
                if (maxlength != NULL && (*maxlength)-- == 0) {
                        log_warnx("maximum length exceeded");
+                       free(buf);
                        return (NULL);
                }