Process exe property and NULL bytes error on Linux

_From [g.rodola](https://code.google.com/u/g.rodola/) on December 30, 2010 17:41:03_

```
The problem is described here: 
https://groups.google.com/forum/?hl=en_US#!topic/psutil/VnfgcaP-ddQ
```

_Original issue: http://code.google.com/p/psutil/issues/detail?id=146_
