Bug#229465: partman, command_set_flags() breaks if flags added to parted

[Richard Hirst <rhirst@linuxcare.com>]

Package: partman
Version: 6
Tags: d-i

command_set_flags() depends on PED_PARTITION_LAST_FLAG, and so it breaks
if any extra flags are added to parted.  I am working on adding a new
parted flag to handle hppa boot partitions, and it would be nice if
partman didn't need rebuilding to support it.

The obvious solution is to loop calling ped_partition_flag_next() to
determine how many flags there are, then malloc states[].

Thanks,
  Richard