Update transcript-tracer.js

transcript-tracer.js

@@ -652,7 +652,7 @@ function handleSelection() {
   var endSeconds = null;  
   if (endWordIndexForTime !== undefined) {
     endSeconds = ttLinkedDataByMediaUrl[mediaUrl].wordTimings[endWordIndexForTime].startSeconds;
-    if (endWordListIndexForTime == nodes.length - 1) {
+    if (endWordElement.listIndex == nodes.length - 1) {
       endSeconds = ttLinkedDataByMediaUrl[mediaUrl].wordTimings[endWordIndexForTime].endSeconds;
     }
   }