From bdb6a71d3d4173b02d24f302af2c2707df85e95b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pavel=20Jan=C3=ADk?= <Pavel@Janik.cz>
Date: Sat, 20 Dec 2014 16:58:40 +0100
Subject: [PATCH] IsNull doesn't change CBlockLocator, add const hint

---
 src/primitives/block.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/primitives/block.h b/src/primitives/block.h
index a189592539..4f2ed36b46 100644
--- a/src/primitives/block.h
+++ b/src/primitives/block.h
@@ -162,7 +162,7 @@ struct CBlockLocator
         vHave.clear();
     }
 
-    bool IsNull()
+    bool IsNull() const
     {
         return vHave.empty();
     }