QA: Fix a bug in 'getwitnessinfo' RPC command
QA: Fix a bug in 'getwitnessinfo' RPC command

When using a range some of the counters were not being reset for each individual block so the individual block results were not correct
Fixes #245

nlgcoin/guldencoin-official,nlgcoin/guldencoin-official,nlgcoin/guldencoin-official,nlgcoin/guldencoin-official,nlgcoin/guldencoin-official,nlgcoin/guldencoin-official