Fix missing/broken ds.Stop handling in raw DS.

filter/dsQueryBatch/filter.go

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package dsQueryBatch
 
 import (
         "fmt"
 
         ds "github.com/luci/gae/service/datastore"
@@ skipping 39 matching lines @@
                                 return err
                         }
 
                         // If this is the last entry in our batch, get the cursor and stop this
                         // query round.
                         count++
                         if count >= f.batchSize {
                                 if cursor, err = getCursor(); err != nil {
                                         return fmt.Errorf("failed to get cursor: %v", err)
                                 }
+                                return ds.Stop
                         }
                         return nil
                 })
                 if err != nil && err != ds.Stop {
                         return err
                 }
 
                 // If we have no cursor, we're done.
                 if cursor == nil {
                         break
                 }
 
                 // Reduce our limit for the next round.
                 if hasLimit {
                         limit -= count
                         if limit <= 0 {
                                 break
                         }
                 }
         }
         return nil
 }