#89 Filter on LargeInt Int64 values

[Stephane Senecal]

When trying to filter on a column with a largeint, it crashes in dbf_prscore.TCustomExpressionParser.CreateConstant at line 1306,
It tries to create a TIntegerConstant but it should create a TLargeIntConstant.
There might be other areas to consider.

[Paul Baker]

Here is an example that reproduces this for a table, test.dbf, that has a numeric field named "I".

program bug89;

uses
  dbf;

var
  ADbf: TDbf;
begin
  ADbf := TDbf.Create(nil);
  try
    ADbf.TableName := 'test.dbf';
    ADbf.Open;
    ADbf.Filter := 'I=2147483648';
    ADbf.Filtered := True;
  finally
    ADbf.Free;
  end;
end.

I fixed this in revision 644.

I did not find any other improper uses of StrToInt().

Is there anything else I should look at?