Putting a check in for over-large payment intervals.

Fixes/Closes #99

lib/payments.js

@@ -347,7 +347,11 @@ let paymentQueue = async.queue(function (paymentDetails, callback) {
 
 paymentQueue.drain = function(){
     extraPaymentRound = false;
-    paymentTimer = setInterval(makePayments, global.config.payout.timer * 60 * 1000);
+    if (global.config.payout.timer > 35791){
+        console.error("Payout timer is too high.  Please use a value under 35791 to avoid overflows.");
+    } else {
+        paymentTimer = setInterval(makePayments, global.config.payout.timer * 60 * 1000);
+    }
     global.database.setCache('lastPaymentCycle', Math.floor(Date.now()/1000));
     sock.send(['payments', 'complete']);
 };
@@ -685,10 +689,6 @@ function init() {
         setInterval(updateShapeshiftCompletion, 90000);
         setInterval(determineBestExchange, 60000);
     }
-    setInterval(function () {
-        global.support.rpcWallet("sweep_dust", [], function () {
-        });
-    }, 86400000 * 3);
     setInterval(function () {
         global.support.rpcWallet("store", [], function () {
         });