The alert for inputting highscore name causes crash in iOS 4

[RafaelAyala]

In the gameviewcontroller.m , the winGame function, this line
winAlert.alertViewStyle = UIAlertViewStylePlainTextInput;
causes iOS 4 to crash.

One possible solution is to scrap using this to display the textbox and manually putting one into the xib which is hidden until the player finishes, then they can input the name on it and it disappears again.