[gnome-shell] search: Match an empty array, not a null one

[Jasper St. Pierre <jstpierre src gnome org>]

commit 2cefc8be2717da9d6a1dff408043052d8d2cf70b
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Tue Sep 30 00:19:55 2014 -0600

    search: Match an empty array, not a null one
    
    When the terms are missing, we pass an empty array, not a null one.

 js/ui/search.js |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/js/ui/search.js b/js/ui/search.js
index ec00bae..709484d 100644
--- a/js/ui/search.js
+++ b/js/ui/search.js
@@ -492,7 +492,7 @@ const SearchResults = new Lang.Class({
         this._cancellable.cancel();
         this._cancellable.reset();
 
-        if (!terms) {
+        if (terms.length == 0) {
             this._clearSearchTimeout();
             return;
         }