Add const to methods that do not modify the object for which it is called

src/qt/transactionrecord.cpp

@@ -248,7 +248,7 @@ void TransactionRecord::updateStatus(const CWalletTx &wtx)
     status.needsUpdate = false;
 }
 
-bool TransactionRecord::statusUpdateNeeded()
+bool TransactionRecord::statusUpdateNeeded() const
 {
     AssertLockHeld(cs_main);
     return status.cur_num_blocks != chainActive.Height() || status.needsUpdate;