[gnome-shell] search: Fix default drag actor source

[Florian Müllner <fmuellner src gnome org>]

commit 62bfde45aa0ab35717571a13cd681617bc9015ce
Author: Florian Müllner <fmuellner gnome org>
Date:   Tue Aug 19 20:32:53 2014 +0200

    search: Fix default drag actor source
    
    Another unnoticed fallout from commit 792b963bda8c ...

 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 16ec4d2..2dcfcb9 100644
--- a/js/ui/search.js
+++ b/js/ui/search.js
@@ -267,7 +267,7 @@ const GridSearchResult = new Lang.Class({
 
         if (!dragSource)
             // not exactly right, but alignment problems are hard to notice
-            dragSource = content;
+            dragSource = content.actor;
         this._dragActorSource = dragSource;
     },