allow protocols to be configured with a default filter, p=aabt, r=me (closes #2292)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@9702 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Protocol/HTTP.js

@@ -136,6 +136,7 @@ OpenLayers.Protocol.HTTP = OpenLayers.Class(OpenLayers.Protocol, {
      *     is then populated with the the features received from the server.
      */
     read: function(options) {
+        OpenLayers.Protocol.prototype.read.apply(this, arguments);
         options = OpenLayers.Util.applyDefaults(options, this.options);
         var readWithPOST = (options.readWithPOST !== undefined) ?
                            options.readWithPOST : this.readWithPOST;