Fix a bug in synchronous model similarity

luprex/core/cpp/lpxclient.cpp

@@ -24,18 +24,15 @@ public:
         // Create the world model.
         world_.reset(new World(util::WORLD_TYPE_C_SYNC));
 
-        // Snapshot the initial state.
-        world_->snapshot();
-
-        // Clear the unack command queue.
-        unack_.clear();
-
         // This is a temporary actor that will be used only until the server sends
         // us the first difference transmission.  We do this only to establish
         // the invariant that there's always an actor.  When the first difference
         // transmission arrives, this actor may be deleted, or it may just be
         // ignored, at the server's discretion.
         actor_id_ = world_->create_login_actor();
+
+        // Clear the unack command queue.
+        unack_.clear();
     }