From 3565d5dfe75ce0d18c627815403e81a41f42b0c3 Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Thu, 16 Nov 2017 10:04:14 -0800
Subject: [PATCH] chaindb: minor.

---
 lib/blockchain/chaindb.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/blockchain/chaindb.js b/lib/blockchain/chaindb.js
index 8d443cf6..396aa544 100644
--- a/lib/blockchain/chaindb.js
+++ b/lib/blockchain/chaindb.js
@@ -2157,12 +2157,12 @@ class ChainState {
   }
 
   add(coin) {
-    this.coin++;
+    this.coin += 1;
     this.value += coin.value;
   }
 
   spend(coin) {
-    this.coin--;
+    this.coin -= 1;
     this.value -= coin.value;
   }