(svn r2951) - Fix: [ 1259345 ] Changing engine in netgame opens train window for everyone

- Add IsLocalPlayer() which substitutes _local_player == _current_player

ai/default/default.c

@@ -3831,7 +3831,7 @@ static void AiHandleTakeover(Player *p)
 			return;
 		p->bankrupt_timeout = 0;
 		DeleteWindowById(WC_BUY_COMPANY, _current_player);
-		if (_current_player == _local_player) {
+		if (IsLocalPlayer()) {
 			AskExitToGameMenu();
 			return;
 		}