JCLOUDS-619

Hello,

this is the fix for the issue described here[1].

Please review and let me know if you need something else.

Thanks and kind regards
Markus

[1] https://issues.apache.org/jira/browse/JCLOUDS-619
[minor] Is this intended to have the same result as `(int) Math.ceil(Math.log10(totalParts))`? If so, perhaps this is (mathematically) a bit more obvious?