From 45da1ff34050703d07d6410ffece69a642f12c4a Mon Sep 17 00:00:00 2001
From: Ivan Maidanski <ivmai@mail.ru>
Date: Wed, 14 Aug 2019 12:32:52 +0300
Subject: [PATCH] Fix 'condition pred!=NULL is always true' compiler warning

Duplicate check of pred!=NULL is removed in add_edge.

* backgraph.c [MAKE_BACK_GRAPH] (add_edge): Remove pred!=NULL.
---
 backgraph.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/backgraph.c b/backgraph.c
index 8ea4251..7e33f42 100644
--- a/backgraph.c
+++ b/backgraph.c
@@ -240,7 +240,7 @@ static void add_edge(ptr_t p, ptr_t q)
 
       if (((word)pred & FLAG_MANY) != 0) {
         n_edges = e -> n_edges;
-      } else if (pred != NULL && ((word)pred & 1) == 0) {
+      } else if (((word)pred & 1) == 0) {
         /* A misinterpreted freelist link.      */
         n_edges = 1;
         local = -1;
-- 
2.7.4