don't allow dead players to surrender in ep3

src/ChatCommands.cc

@@ -2476,6 +2476,11 @@ static void server_command_surrender(shared_ptr<Client> c, const std::string&) {
     send_text_message(c, "$C6Battle has not\nyet started");
     return;
   }
+  auto ps = l->ep3_server->get_player_state(c->lobby_client_id);
+  if (!ps || !ps->is_alive()) {
+    send_text_message(c, "$C6Defeated players\ncannot surrender");
+    return;
+  }
   string name = remove_color(c->character()->disp.name.decode(c->language()));
   send_text_message_printf(l, "$C6%s has\nsurrendered", name.c_str());
   for (const auto& watcher_l : l->watcher_lobbies) {

src/Episode3/PlayerState.cc

@@ -132,6 +132,11 @@ shared_ptr<const Server> PlayerState::server() const {
   return s;
 }
 
+bool PlayerState::is_alive() const {
+  auto sc_card = this->get_sc_card();
+  return (sc_card && !(sc_card->card_flags & 2));
+}
+
 bool PlayerState::draw_cards_allowed() const {
   if (this->assist_flags & AssistFlag::IS_SKIPPING_TURN) {
     return false;

src/Episode3/PlayerState.hh

@@ -47,6 +47,8 @@ public:
   std::shared_ptr<Server> server();
   std::shared_ptr<const Server> server() const;
 
+  bool is_alive() const;
+
   bool draw_cards_allowed() const;
   void apply_assist_card_effect_on_set(std::shared_ptr<PlayerState> setter_ps);
   void apply_dice_effects();