Stop modifying the passed tx in NewScript.
Stop modifying the passed tx in NewScript.

The only time we need to zero out scripts is for calcScriptHash which operates
on a deep copy anyway. This should make the tx passed to us unmodified now.

sysbot/btcd,ltcsuite/ltcd,dan-da/btcd,jimmysong/btcd,tb00/btcd,jrick/dcrd,ppcsuite/ppcd,adiabat/btcd,hectorj/btcd,cqswxj2013/btcd,jcmincke/dcrd,stevenroose/btcd,glv2/ppcd,runeaune/btcd,jrick/btcd,runeaune/btcd,jrick/btcd,CryptocurrencyCabal/htcd,toddfries/btcd,pkothbauer/btcd,toddfries/btcd,tb00/btcd,Stash-Crypto/btcd,soapboxsys/ombfullnode,adiabat/btcd,jimmysong/btcd,jcmincke/dcrd,btcsuite/btcd,1d4Nf6/btcd,mathiasrw/btcd,qchain/btcd,1d4Nf6/btcd,jrick/btcd,jcmincke/dcrd,FactomProject/btcd,btcsuitereleases/btcd,pkothbauer/btcd,DanielKrawisz/btcd,hectorj/btcd,danoctavian/btcd,cjepson/btcd,cjepson/btcd,dajohi/btcd,davecgh/btcd,Roasbeef/btcd,Roasbeef/btcd,jrick/dcrd,stevenroose/btcd,dajohi/btcd,btcsuitereleases/btcd,qchain/btcd,decred/dcrd,dan-da/btcd,ppcsuite/ppcd,ppcsuite/ppcd-old,btcsuite/btcd,wallclockbuilder/btcd,Dirbaio/btcd,jongillham/btcd,aakselrod/btcd,Stash-Crypto/btcd,cqswxj2013/btcd,sysbot/btcd,aakselrod/btcd,glv2/ppcd,DanielKrawisz/btcd,BitGo/prova,Cleawing/btcd,davecgh/btcd,soapboxsys/ombfullnode,jongillham/btcd,ppcsuite/ppcd-old,Dirbaio/btcd,FactomProject/btcd,CryptocurrencyCabal/htcd,decred/dcrd,Cleawing/btcd,ltcsuite/ltcd,Dirbaio/btcd,dajohi/btcd,wallclockbuilder/btcd,danoctavian/btcd,BitGo/prova,mathiasrw/btcd