UDapp: simplify tryTillResponse()

src/universal-dapp.js

@@ -644,15 +644,14 @@ UniversalDApp.prototype.runTx = function (data, args, cb) {
 };
 
 function tryTillResponse (web3, txhash, done) {
-  web3.eth.getTransactionReceipt(txhash, testResult);
-
-  function testResult (err, address) {
+  web3.eth.getTransactionReceipt(txhash, function (err, address) {
     if (!err && !address) {
+      // Try again with a bit of delay
       setTimeout(function () { tryTillResponse(web3, txhash, done); }, 500);
     } else {
       done(err, address);
     }
-  }
+  });
 }
 
 module.exports = UniversalDApp;