Bug#317596: autopartkit: fails when more than one lvm volume group on powerpc

[Petter Reinholdtsen <pere@hungry.com>]

The problem seem to start early.  The negative number -669253632
should be a positive number, as toe code assume all requested
partition sizes are non-negative.

Jul  8 12:57:50 autopartkit[6382]: Using 'msdos' default disk label type 
Jul  8 12:57:51 autopartkit[6382]: Created LVM stacks 
Jul  8 12:57:51 autopartkit[6382]: Found free space, distributing partitions. 
Jul  8 12:57:51 autopartkit[6382]: Adding 262144 to total_wanted, now 262144 
Jul  8 12:57:51 autopartkit[6382]: Adding 16318464 to total_wanted, now 16580608 
Jul  8 12:57:51 autopartkit[6382]: Adding 77968752 to total_wanted, now 94549360 
Jul  8 12:57:51 autopartkit[6382]: Adding -669253632 to total_wanted, now -574704272 
Jul  8 12:57:51 autopartkit[6382]: distribute_partition ok.

I do not know how this could happen.  powerpc make me suspect some
endian problem, but the negative numbers smell of some signed/unsigned
or int/long mixup.