fix calling DisconnectPlayer twice in TagDuel::LeaveGame

gframe/tag_duel.cpp

@@ -143,7 +143,6 @@ void TagDuel::LeaveGame(DuelPlayer* dp) {
 					NetServer::SendPacketToPlayer(players[i], STOC_HS_PLAYER_CHANGE, scpc);
 			for(auto pit = observers.begin(); pit != observers.end(); ++pit)
 				NetServer::SendPacketToPlayer(*pit, STOC_HS_PLAYER_CHANGE, scpc);
-			NetServer::DisconnectPlayer(dp);
 		} else if(duel_stage != DUEL_STAGE_END) {
 			EndDuel();
 			DuelEndProc();
@@ -228,7 +227,7 @@ void TagDuel::PlayerReady(DuelPlayer* dp, bool is_ready) {
 		unsigned int deckerror = 0;
 		if(!host_info.no_check_deck) {
 			if(deck_error[dp->type]) {
-				deckerror = (DECKERROR_UNKNOWNCARD << 28) + deck_error[dp->type];
+				deckerror = (DECKERROR_UNKNOWNCARD << 28) | deck_error[dp->type];
 			} else {
 				deckerror = deckManager.CheckDeck(pdeck[dp->type], host_info.lflist, host_info.rule);
 			}