moved field to local

src/main/java/inf101/v20/sem2/mnkgames/GUI/MNKGameGUI.java

@@ -54,7 +54,6 @@ s	 * Initializes a JFrame in which we place the game
 	private JLabel statusMessage;
 	private Grid<GamePanel> clickablePanels;
 	private GameSupplier gameSupplier;
-	private boolean multiplayer;
 	private TwoPlayerGame game;
 
 	public MNKGameGUI(GameSupplier gameSupplier) {
@@ -258,7 +257,7 @@ s	 * Initializes a JFrame in which we place the game
 	 */
 	private void collectPlayerInfo() {
 		JFrame frame = new JFrame();
-		multiplayer = promptMultiplayer(frame);
+		boolean multiplayer = promptMultiplayer(frame);
 		game.setHumanPlayer1(promptPlayerName(frame, "Player 1"));
 		if(multiplayer) {
 			game.setHumanPlayer2(promptPlayerName(frame, "Player 2"));