Update transcript-tracer.js

transcript-tracer.js

@@ -569,7 +569,7 @@ function handleSelection() {
   var startWordElementForHighlight = startWordElement
   
   while (startWordElementForHighlight.className == "tt-whitespace") {
-    var index = startWordElementForTime.listIndex + 1;
+    var index = startWordElementForHighlight.listIndex + 1;
     if (index >= nodes.length) break;
     startWordElementForHighlight = nodes[index];
   }