Merge branch 'j-grt push origin 2.0:wq!

id_store-global-leak' into 2.0

Author: christkv

lib/gridfs/grid_store.js

@@ -43,7 +43,7 @@ var Chunk = require('./chunk'),
   inherits = util.inherits,
   Duplex = require('stream').Duplex;
 
-var REFERENCE_BY_FILENAME = 0;
+var REFERENCE_BY_FILENAME = 0,
   REFERENCE_BY_ID = 1;
 
 /**