From b8101fb7ac4bfa0e5c0ee2459b24bddaf59fe7c4 Mon Sep 17 00:00:00 2001
From: Hennadii Stepanov <32963518+hebasto@users.noreply.github.com>
Date: Fri, 29 Nov 2019 20:15:45 +0200
Subject: [PATCH] Fix comparison function signature

This commit fixes build on CentOS 7 with GCC 4.8.5

Github-Pull: #17634
Rebased-From: b66861e2e5e8a49e11e7489cf22c3007bc7082cc
---
 src/qt/recentrequeststablemodel.cpp | 9 ++++-----
 src/qt/recentrequeststablemodel.h   | 2 +-
 2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/src/qt/recentrequeststablemodel.cpp b/src/qt/recentrequeststablemodel.cpp
index 1611ec823..64bfb7d64 100644
--- a/src/qt/recentrequeststablemodel.cpp
+++ b/src/qt/recentrequeststablemodel.cpp
@@ -11,8 +11,7 @@
 #include <clientversion.h>
 #include <streams.h>
 
-#include <algorithm>
-
+#include <utility>
 
 RecentRequestsTableModel::RecentRequestsTableModel(WalletModel *parent) :
     QAbstractTableModel(parent), walletModel(parent)
@@ -213,10 +212,10 @@ void RecentRequestsTableModel::updateDisplayUnit()
     updateAmountColumnTitle();
 }
 
-bool RecentRequestEntryLessThan::operator()(RecentRequestEntry &left, RecentRequestEntry &right) const
+bool RecentRequestEntryLessThan::operator()(const RecentRequestEntry& left, const RecentRequestEntry& right) const
 {
-    RecentRequestEntry *pLeft = &left;
-    RecentRequestEntry *pRight = &right;
+    const RecentRequestEntry* pLeft = &left;
+    const RecentRequestEntry* pRight = &right;
     if (order == Qt::DescendingOrder)
         std::swap(pLeft, pRight);
 
diff --git a/src/qt/recentrequeststablemodel.h b/src/qt/recentrequeststablemodel.h
index 130b709d4..66e8d4f22 100644
--- a/src/qt/recentrequeststablemodel.h
+++ b/src/qt/recentrequeststablemodel.h
@@ -43,7 +43,7 @@ class RecentRequestEntryLessThan
 public:
     RecentRequestEntryLessThan(int nColumn, Qt::SortOrder fOrder):
         column(nColumn), order(fOrder) {}
-    bool operator()(RecentRequestEntry &left, RecentRequestEntry &right) const;
+    bool operator()(const RecentRequestEntry& left, const RecentRequestEntry& right) const;
 
 private:
     int column;