board: fix cloisters not being scored on time

read the variable after assigning, not before...

board.go

@@ -262,8 +262,8 @@ func (b *Board) TryScore(x, y int, id byte, gameEnd bool) (closed bool, score in
 				}
 			}
 		}
-		closed = (score == 9)
 		score = baseScore
+		closed = (score == 9)
 	case fRoad:
 		visited := make(map[Coord]struct{})
 		hasInn := false