From 763bc36563d2f358debf283fafe2efeb54a95c23 Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Tue, 15 Sep 2015 13:23:34 -0700
Subject: [PATCH] Add const to fix the build

---
 tile.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tile.cc b/tile.cc
index d4f6003d..80a96dbe 100644
--- a/tile.cc
+++ b/tile.cc
@@ -146,7 +146,7 @@ struct coalesce {
 };
 
 struct preservecmp {
-	bool operator()(struct coalesce &a, struct coalesce &b) {
+	bool operator()(const struct coalesce &a, const struct coalesce &b) {
 		return a.original_seq < b.original_seq;
 	}
 } preservecmp;