[gnome-documents] sources: fix a refactoring leftover

[Cosimo Cecchi <cosimoc src gnome org>]

commit f67ded6653bba5d5cd55db0112ee80b1d42cc1be
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Thu Aug 25 17:48:44 2011 -0400

    sources: fix a refactoring leftover

 src/sources.js |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/sources.js b/src/sources.js
index 6830222..45ec717 100644
--- a/src/sources.js
+++ b/src/sources.js
@@ -103,9 +103,9 @@ Source.prototype = {
         return filter;
     },
 
-    _buildFilterResource: function(subject, resourceUrn) {
+    _buildFilterResource: function(subject) {
         let filter =
-            ('(nie:dataSource(%s) = "<%s>")').format(subject, resourceUrn);
+            ('(nie:dataSource(%s) = "<%s>")').format(subject, this.resourceUrn);
 
         return filter;
     }