Fix broken suggestions for preview.

Change-Id: I1a13a3a9d9e38470ac040a37cdd04319bd6340e6
diff --git a/tools/droiddoc/templates-sdk/assets/js/docs.js b/tools/droiddoc/templates-sdk/assets/js/docs.js
index 372f257..b5a4943 100644
--- a/tools/droiddoc/templates-sdk/assets/js/docs.js
+++ b/tools/droiddoc/templates-sdk/assets/js/docs.js
@@ -2362,10 +2362,10 @@
           }
 
           // Search for Preview Guides
-          for (var i=0; i<_RESOURCES.length; i++) {
+          for (var i=0; i<PREVIEW_RESOURCES.length; i++) {
             // current search comparison, with counters for tag and title,
             // used later to improve ranking
-            var s = _RESOURCES[i];
+            var s = PREVIEW_RESOURCES[i];
             s.matched_tag = 0;
             s.matched_title = 0;
             var matched = false;