update lobby datas on team master transfer

src/ReceiveCommands.cc

@@ -4845,6 +4845,7 @@ static void on_EA_BB(shared_ptr<Client> c, uint16_t command, uint32_t flag, stri
         // The client only sends this command with flag = 0x00, 0x30, or 0x40
         bool send_updates_for_this_m = false;
         bool send_updates_for_other_m = false;
+        bool send_master_transfer_updates = false;
         switch (flag) {
           case 0x00: // Demote member
             if (s->team_index->demote_leader(c->license->serial_number, cmd.guild_card_number)) {
@@ -4867,11 +4868,21 @@ static void on_EA_BB(shared_ptr<Client> c, uint16_t command, uint32_t flag, stri
             send_command(c, 0x11EA, 0x00000000);
             send_updates_for_this_m = true;
             send_updates_for_other_m = true;
+            send_master_transfer_updates = true;
             break;
           default:
             throw runtime_error("invalid privilege level");
         }
 
+        if (send_master_transfer_updates) {
+          for (const auto& it : team->members) {
+            try {
+              auto other_c = s->find_client(nullptr, it.second.serial_number);
+              send_update_lobby_data_bb(other_c);
+            } catch (const out_of_range&) {
+            }
+          }
+        }
         if (send_updates_for_this_m) {
           send_update_team_metadata_for_client(c);
           send_team_membership_info(c);