Please review: [Bug 622628] fix coverity Defect Type: Integer handling issues

[Noriko Hosoi]

https://bugzilla.redhat.com/show_bug.cgi?id=622628

https://bugzilla.redhat.com/attachment.cgi?id=437950&action=diff
https://bugzilla.redhat.com/attachment.cgi?id=437950&action=edit

https://bugzilla.redhat.com/attachment.cgi?id=437952&action=diff
https://bugzilla.redhat.com/attachment.cgi?id=437952&action=edit

https://bugzilla.redhat.com/attachment.cgi?id=437960&action=diff
https://bugzilla.redhat.com/attachment.cgi?id=437960&action=edit

Thanks,
--noriko