Use C++11 default member initializers

src/qt/recentrequeststablemodel.h

@@ -94,7 +94,7 @@ private:
     WalletModel *walletModel;
     QStringList columns;
     QList<RecentRequestEntry> list;
-    int64_t nReceiveRequestsMaxId;
+    int64_t nReceiveRequestsMaxId{0};
 
     /** Updates the column title to "Amount (DisplayUnit)" and emits headerDataChanged() signal for table headers to react. */
     void updateAmountColumnTitle();