Fix for DFL-3491: "Request" event missing after re-connecting a remote session

Author: Daniel Herzog

src/lib/messagemixin.js

@@ -21,6 +21,13 @@ cls.MessageMixin = function()
    */
   this.add_listener = function(name, cb)
   {
+    if (!cb)
+    {
+      opera.postError(ui_strings.S_DRAGONFLY_INFO_MESSAGE +
+                      "No callback function for message listener provided: " + name);
+      return;
+    }
+
     if(! this._mm_listeners)
     {
       this._mm_listeners = {};

src/network/network_request_crafting_view.js

@@ -312,7 +312,6 @@ cls.RequestCraftingView = function(id, name, container_class, html, default_hand
   this.required_services = ["resource-manager", "document-manager"];
   this._service = window.services['resource-manager'];
   this._service.addListener("urlload", this._on_urlload_bound);
-  this._service.addListener("request", this._on_request_bound);
   this._service.addListener("response", this._on_response_bound);
   this._service.addListener("responseheader", this._on_responseheader_bound);
   this._service.addListener("responsefinished", this._on_responsefinished_bound);