Patch for bugs in json.pm

Hello,

I found 3 bugs in the json.pm module:

- dump_duration shows minutes only (no seconds)
- tape_duration shows minutes only (no seconds)
- Avg Compressed Size shows incr. value for every value

Here is diff fixing all 3:

--- json.pm.orig 2016-02-22 09:49:51.000000000 -0700
+++ json.pm 2016-02-25 20:45:17.119683669 -0700
@@ -256,8 +256,8 @@
     };

     $self->{'sections'}{'statistic'}{'avg_compression'} = {
- total => $comp_size->($incr_stats),
- full  => $comp_size->($incr_stats),
+ total => $comp_size->($total_stats),
+ full  => $comp_size->($full_stats),
  incr  => $comp_size->($incr_stats)
     };

@@ -535,9 +535,9 @@
  'dump_orig_kb' => $$record[4],
  'dump_out_kb' => $$record[5],
  'dump_comp' => $$record[6],
- 'dump_duration' => int($$record[7]),
+ 'dump_duration' => $$record[7],
  'dump_rate' => $$record[8],
- 'tape_duration' => int($$record[9]),
+ 'tape_duration' => $$record[9],
  'tape_rate' => $$record[10],
  'dump_partial' => $$record[11],
  'last_tape_label' => $$record[12]


Thanks,
Michael