More refactoring and cleanup

luprex/core/cpp/world-core.cpp

@@ -237,7 +237,9 @@ util::IdVector World::get_near_unsorted(int64_t player_id, float radius, bool ex
     // Find out where's the center of the world.
     const AnimStep &aqback = player->anim_queue_.back();
     if (exclude_nowhere && (aqback.plane() == "nowhere")) {
-        return IdVector();
+        IdVector idv;
+        idv.push_back(player_id);
+        return idv;
     }
     
     return plane_map_.scan_radius(aqback.plane(), aqback.xyz().x, aqback.xyz().y, radius, player_id);
@@ -274,7 +276,7 @@ int64_t World::create_login_actor() {
 
 void World::update_gui(int64_t actor_id, int64_t place_id, Gui *gui) {
     assert(stack_is_clear());
-    gui->clear();
+    gui->clear(place_id);
     lua_State *L = state();
 
     LuaVar actor, place, ugui, func, tangibles, mt, index;
@@ -316,7 +318,7 @@ void World::update_gui(int64_t actor_id, int64_t place_id, Gui *gui) {
     close_lthread_state();
     Gui::store_global_pointer(L, nullptr);
     if (status != 0) {
-        gui->clear();
+        gui->clear(0);
         std::cerr << lua_tostring(L, -1);
         LS.result();
         return;