Update `PDFOutlineViewer_bindLink` to look more like `LinkAnnotationElement_bindLink`

src/display/annotation_layer.js

@@ -299,7 +299,7 @@ var LinkAnnotationElement = (function LinkAnnotationElementClosure() {
         if (this.data.action) {
           this._bindNamedAction(link, this.data.action);
         } else {
-          this._bindLink(link, (this.data.dest || null));
+          this._bindLink(link, this.data.dest);
         }
       }
 

web/pdf_outline_viewer.js

@@ -90,10 +90,13 @@ var PDFOutlineViewer = (function PDFOutlineViewerClosure() {
         });
         return;
       }
-      var linkService = this.linkService;
-      element.href = linkService.getDestinationHash(item.dest);
-      element.onclick = function goToDestination(e) {
-        linkService.navigateTo(item.dest);
+      var self = this, destination = item.dest;
+
+      element.href = self.linkService.getDestinationHash(destination);
+      element.onclick = function () {
+        if (destination) {
+          self.linkService.navigateTo(destination);
+        }
         return false;
       };
     },