Bad Assert in TVirtualTreeColumns.GetPreviousColumn

[tecmatia-dp]

I recently updated to V8.0.
In a tree with 45 columns, which allow the user to change the order, I am seeing an exception in some cases, with the error "The previous column must not have the same position as the given column."
Debugging the problem, I locate the origin in the function TVirtualTreeColumns.GetPreviousColumn:

function TVirtualTreeColumns.GetPreviousColumn(Column : TColumnIndex) : TColumnIndex;

// Returns the previous column in display order, Column is an index into the columns list.

var
  Position : Integer;

begin
  if Column < 0 then
    Result := InvalidColumn
  else
  begin
    Position := Items[Column].Position;
    if Position > 0 then
      Result := FPositionToIndex[Position - 1]
    else
      Result := InvalidColumn;
    Assert(Position <> Result, 'The previous column must not have the same position as the given column.');
  end;
end;

With this array of positions:
FPositionToIndex = (0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 16, 9, 43, 44, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 32, 33, 34, 35, 36, 37, 38, 39, 40, 31, 42, 45, 41)
Without any repeated value, it throws the assert exception, for Column=41, and Position=45, but it should not.

I have realized that the Assert is comparing an index with a position, ... the correct thing would be

Assert(Result <> Column, 'The previous column must not have the same position as the given column.');