Need to return null, not True.

lib/api.js

@@ -383,11 +383,11 @@ app.get('/miner/:address/stats', function (req, res) {
     let payment_id = address_parts[1];
     let cachedData = global.database.getCache(address);
     let paidQuery = "SELECT SUM(amount) as amt FROM payments WHERE payment_address = ? AND payment_id = ?";
-    let txnCount = "SELECT count(id) as amt FROM payments WHERE payment_address = ? AND payment_id = ?";
+    let txnQuery = "SELECT count(id) as amt FROM payments WHERE payment_address = ? AND payment_id = ?";
     let unpaidQuery = "SELECT SUM(amount) as amt FROM balance WHERE payment_address = ? AND payment_id = ?";
     if (typeof(payment_id) === 'undefined') {
         paidQuery = "SELECT SUM(amount) as amt FROM payments WHERE payment_address = ? AND payment_id IS ?";
-        txnCount = "SELECT count(id) as amt FROM payments WHERE payment_address = ? AND payment_id IS ?";
+        txnQuery = "SELECT count(id) as amt FROM payments WHERE payment_address = ? AND payment_id IS ?";
         unpaidQuery = "SELECT SUM(amount) as amt FROM balance WHERE payment_address = ? AND payment_id IS ?";
     }
     async.waterfall([
@@ -421,12 +421,12 @@ app.get('/miner/:address/stats', function (req, res) {
                         returnData.amtDue = 0;
                     }
                 }
-                return callback(true, returnData);
+                return callback(null, returnData);
             });
         },
         function (returnData, callback) {
             debug(threadName + "Checking MySQL total amount unpaid for /miner/address/stats");
-            global.mysql.query(txnCount, [address_pt, payment_id]).then(function (rows) {
+            global.mysql.query(txnQuery, [address_pt, payment_id]).then(function (rows) {
                 if (typeof(rows[0]) === 'undefined') {
                     returnData.txnCount = 0;
                 } else {