From c21cbe61c6249bcfca098705df6f9b4baab9f296 Mon Sep 17 00:00:00 2001
From: Pieter Wuille <pieter.wuille@gmail.com>
Date: Fri, 17 Feb 2017 16:32:16 -0800
Subject: [PATCH] Introduce FastRandomContext::randbool()

---
 src/random.h          | 4 ++++
 src/wallet/wallet.cpp | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/random.h b/src/random.h
index 0464bdce1..82886bec5 100644
--- a/src/random.h
+++ b/src/random.h
@@ -42,6 +42,10 @@ public:
         return (Rw << 16) + Rz;
     }
 
+    bool randbool() {
+        return rand32() & 1;
+    }
+
     uint32_t Rz;
     uint32_t Rw;
 };
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index 39e2ab7c1..2f9d47aa0 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -2048,7 +2048,7 @@ static void ApproximateBestSubset(const std::vector<std::pair<CAmount, std::pair
                 //that the rng is fast. We do not use a constant random sequence,
                 //because there may be some privacy improvement by making
                 //the selection random.
-                if (nPass == 0 ? insecure_rand.rand32()&1 : !vfIncluded[i])
+                if (nPass == 0 ? insecure_rand.randbool() : !vfIncluded[i])
                 {
                     nTotal += vValue[i].first;
                     vfIncluded[i] = true;