refactoring: using else and if

src/main/c/GameTic_Tac_Toe/game.c

@@ -27,7 +27,7 @@ char checkWinner() {
     }
      // Überprüfe diagonale Linien
     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];
+    else if (board[0][2] == board[1][1] && board[1][1] == board[2][0]) return board[0][2];
 
  // Kein Gewinner
     return ' ';