No winner

src/main/c/GameTic_Tac_Toe/game.c

@@ -29,3 +29,6 @@ char checkWinner() {
     if (board[0][0] == board[1][1] && board[1][1] == board[2][2]) return board[0][0];
     if (board[0][2] == board[1][1] && board[1][1] == board[2][0]) return board[0][2];
 
+ // Kein Gewinner
+    return ' ';
+}