From 97214080cede3683cadec6259832f11a8e7e6a1e Mon Sep 17 00:00:00 2001
From: kp <kp@FreeBSD.org>
Date: Fri, 2 Nov 2018 19:23:50 +0000
Subject: [PATCH] pf: Fix build if INVARIANTS is not set

r340061 included a number of assertions pf_frent_remove(), but these assertions
were the only use of the 'prev' variable. As a result builds without
INVARIANTS had an unused variable, and failed.

Reported by:	vangyzen@
---
 sys/netpfil/pf/pf_norm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sys/netpfil/pf/pf_norm.c b/sys/netpfil/pf/pf_norm.c
index 5daf19a3f35d..f10a87a895d6 100644
--- a/sys/netpfil/pf/pf_norm.c
+++ b/sys/netpfil/pf/pf_norm.c
@@ -445,7 +445,9 @@ pf_frent_insert(struct pf_fragment *frag, struct pf_frent *frent,
 void
 pf_frent_remove(struct pf_fragment *frag, struct pf_frent *frent)
 {
+#ifdef INVARIANTS
 	struct pf_frent *prev = TAILQ_PREV(frent, pf_fragq, fr_next);
+#endif
 	struct pf_frent *next = TAILQ_NEXT(frent, fr_next);
 	int index;