fix for bug 11412 - history delete broke again..somehow. hacky fix for RTM branch

r=brade, sr=blake, a=chofmann


git-svn-id: svn://10.0.0.236/branches/MOZILLA_0_9_2_BRANCH@98318 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/xpfe/global/resources/content/nsTreeController.js

@@ -321,6 +321,7 @@ function nsTreeController_delete(tree)
             parentID = node.parentNode.parentNode.id;
         if (!parentID) continue;
 
+        var RDF = Components.classes[rdf_contractid].getService(Components.interfaces.nsIRDFService);
         var IDRes = RDF.GetResource(ID);
         if (!IDRes) continue;
         var parentIDRes = RDF.GetResource(parentID);