code changes according to PR line notes

src/quagga.js

@@ -47,9 +47,7 @@ function initInputStream(cb) {
     } else if (_config.inputStream.type === "ImageStream") {
         _inputStream = InputStream.createImageStream();
     } else if (_config.inputStream.type === "LiveStream") {
-
+        var $viewport = getViewPort();
-        var $viewport = getViewPort(_config);
-
         if ($viewport) {
             video = $viewport.querySelector("video");
             if (!video) {
@@ -73,7 +71,7 @@ function initInputStream(cb) {
     _inputStream.addEventListener("canrecord", canRecord.bind(undefined, cb));
 }
 
-function getViewPort(_config) {
+function getViewPort() {
     var target = _config.inputStream.target;
     // Check if target is already a DOM element
     if(target && target.nodeName && target.nodeType === 1) {
@@ -106,9 +104,9 @@ function ready(cb){
     cb();
 }
 
-function initCanvas(_config) {
+function initCanvas() {
     if (typeof document !== "undefined") {
-        var $viewport = getViewPort(_config);
+        var $viewport = getViewPort();
         _canvasContainer.dom.image = document.querySelector("canvas.imgBuffer");
         if (!_canvasContainer.dom.image) {
             _canvasContainer.dom.image = document.createElement("canvas");