deleted counters keeps their value?

[Radim Kolar]

Another problem with counters: Counter delete + incr does not set value 
to 1 but to old value before deletion + 1

[default@whois] list ipbans;
Using default limit of 100
-------------------
RowKey: 10.0.0.7
1 Row Returned.
[default@whois] incr ipbans['10.0.0.7']['hits'];
Value incremented.
[default@whois] list ipbans;
Using default limit of 100
-------------------
RowKey: 10.0.0.7
=> (counter=hits, value=23)

1 Row Returned.
[default@whois]