Invalid rowcount / numrows

```
What steps will reproduce the problem?
1. On some XLS files with multiple sheets, the rowcount is not valid
2. Read XLS file
3. Dump sheet 2

require_once 'excel_reader2.php';
$data = new Spreadsheet_Excel_Reader("example.xls");
echo $data->dump(true,true, 1);

What is the expected output? What do you see instead?
The attached file as 29 rows in the 2nd sheet, when read it 12579 rows are
found !

Please provide any additional information below.
Get attached XLS file as sample to reproduce
```

Original issue reported on code.google.com by `j...@comonsoft.com` on 20 Jul 2009 at 4:53

Attachments:
- [example.xls](https://storage.googleapis.com/google-code-attachments/php-excel-reader/issue-37/comment-0/example.xls)

Reproduce the problem with the attached example.xls and the usage shown in excel_reader2.php, calling dump(true,true, 1) for the second sheet. Compare the reported row count with the expected 29 rows; the issue is complete when the second sheet reports the correct count.

Written by the indexing model from the issue text.