Prevent accessing /nodes/undefined/view from search pages.

`firstHit.attr('data-hit-id')` can be undefined; in that case we just
ignore the siutation.

Furthermore, I've removed the call to clearTimeout(), as it is only
called after the timeout has been hit, and thus is a no-op.

src/scripts/algolia_search.js

@@ -82,17 +82,24 @@ $(document).ready(function() {
         firstHit.addClass('active');
         firstHit.find('#search-loading').addClass('active');
 
-        var getNode = setTimeout(function() {
+        function done() {
-            $.get('/nodes/' + firstHit.attr('data-hit-id') + '/view', function(dataHtml) {
-                    $('#search-hit-container').html(dataHtml);
-                })
-                .done(function() {
             $('.search-loading').removeClass('active');
             $('#search-error').hide();
             $('#search-hit-container').show();
+        }
 
-                    clearTimeout(getNode);
+        window.setTimeout(function() {
+            // Ignore getting that first result when there is none.
+            var hit_id = firstHit.attr('data-hit-id');
+            if (hit_id === undefined) {
+                done();
+                return;
+            }
+
+            $.get('/nodes/' + hit_id + '/view', function(dataHtml) {
+                    $('#search-hit-container').html(dataHtml);
                 })
+                .done(done)
                 .fail(function(data) {
                     $('.search-loading').removeClass('active');
                     $('#search-hit-container').hide();