Merge bitcoin-core/gui#183: Add include for std::bind.

2a39ccf133 Add include for std::bind. (sinetek)

Pull request description:

  Hi, this patch adds in <functional> because the GUI code makes use of std::bind.
  That's all.

ACKs for top commit:
  jonasschnelli:
    utACK 2a39ccf133

Tree-SHA512: fb5ac07d9cd5d006182b52857b289a9926362a2f1bfa4f7f1c78a088670e2ccf39ca28214781df82e8de3909fa3e69685fe1124a7e3ead758575839f5f2277a9

src/qt/bitcoingui.cpp

@@ -30,6 +30,7 @@
 #include <qt/macdockiconhandler.h>
 #endif
 
+#include <functional>
 #include <chain.h>
 #include <chainparams.h>
 #include <interfaces/handler.h>

src/qt/clientmodel.cpp

@@ -19,6 +19,7 @@
 #include <validation.h>
 
 #include <stdint.h>
+#include <functional>
 
 #include <QDebug>
 #include <QThread>

src/qt/splashscreen.cpp

@@ -18,6 +18,8 @@
 #include <util/system.h>
 #include <util/translation.h>
 
+#include <functional>
+
 #include <QApplication>
 #include <QCloseEvent>
 #include <QPainter>

src/qt/transactiontablemodel.cpp

@@ -19,6 +19,7 @@
 #include <uint256.h>
 
 #include <algorithm>
+#include <functional>
 
 #include <QColor>
 #include <QDateTime>

src/qt/walletmodel.cpp

@@ -29,6 +29,7 @@
 #include <wallet/wallet.h> // for CRecipient
 
 #include <stdint.h>
+#include <functional>
 
 #include <QDebug>
 #include <QMessageBox>