report: report -1, not 'unkown' for lv_{snapshot_invalid,merge_failed} with --binary

report: report -1, not 'unkown' for lv_{snapshot_invalid,merge_failed} with --binary

State:
$ lvs -o lv_name,lv_active_locally,lv_snapshot_invalid,lv_merge_failed vg/lvol0
  LV    ActLocal       SnapInvalid     MergeFailed
  lvol0 active locally         unknown         unknown

Now with using --binary switch.

Before this patch (lv_snapshot_invalid and lv_merge_failed not switched into numeric value
where -1 represents 'unknown' value)
$ lvs -o lv_name,lv_active_locally,lv_snapshot_invalid,lv_merge_failed vg/lvol0 --binary
  LV    ActLocal   SnapInvalid     MergeFailed
  lvol0          1         unknown         unknown

With this patch applied:
$ lvs -o lv_name,lv_active_locally,lv_snapshot_invalid,lv_merge_failed vg/lvol0 --binary
  LV    ActLocal   SnapInvalid     MergeFailed
  lvol0          1              -1              -1