DFL-3604: Network related exception on experimental

Author: Daniel Herzog

src/network/network_service.js

@@ -266,7 +266,8 @@ cls.NetworkLogger = function()
       // Guess what the matching entry is from here. This is normally much harder,
       // but we only want to do this workaround in this easy case anyway.
       var matching_entry = ctx.get_entries_with_res_id(data.resourceID)[0];
-      if (matching_entry.events.last &&
+      if (matching_entry &&
+          matching_entry.events.last &&
           matching_entry.events.last.name == "urlredirect")
       {
         remove_from_allocated_after_update = true;