Problems with big negative numbers

```
I have problems with big negative numbers, but only on some servers but I dont
know the reason. I have Windows 7 64bit with Apache/2.2.11 (Win32),PHP/5.2.9.
On this machine is number -1089597 readed from .xls file corectly. But for the
same file readed on Apache/2.2.8 (Ubuntu) PHP/5.2.4-2ubuntu5.10 I get
1072652227 instead -1089597. Do you know which system (Apache / PHP) settings
can I change in order to have corect results? Já dodávám, že tento problém
se děje pro většinu velkých záporných čísel. But I have got here for
example -5596800 and this value is returned correctly on both systems.
```

Original issue reported on code.google.com by `sachmar...@seznam.cz` on 13 Oct 2010 at 9:20

No source file, test, or entry point is named. Start by reproducing the same .xls read under the listed Windows and Ubuntu PHP/Apache environments, then trace the value conversion used for negative numbers. Done means the affected negative values are read consistently across both environments.

Written by the indexing model from the issue text.