fix

processor.cpp

@@ -3150,7 +3150,7 @@ int32 field::process_battle_command(uint16 step) {
 			}
 		}
 		if(!core.attack_target && !core.attacker->operation_param
-			|| std::find(core.select_cards.begin(),core.select_cards.end(), core.attack_target) == core.select_cards.end())
+			|| core.attack_target && std::find(core.select_cards.begin(),core.select_cards.end(), core.attack_target) == core.select_cards.end())
 			rollback = true;
 		if(!rollback) {
 			core.attacker->announce_count++;