simplify use of bignum in ScriptInterpreter
simplify use of bignum in ScriptInterpreter

iobond/bitcore,UdjinM6/darkcore,pnagurny/bitcore,pembo210/Litecore,Bushstar/talentcore,iobond/bitcore,TeamPiggyCoin/PiggyCore,lekkas/bitcore,daxxog/clamcore,braydonf/bitcore,genecyber/bitcore,bilthon/bitcore,martindale/bitcore,genecyber/bitcore,martindale/bitcore,sEpuLchEr/bitcore,sEpuLchEr/bitcore,pembo210/Litecore,Kefkius/clamcore,UdjinM6/bitcore-dash,casinocoin/csc-bitcore-v0.1,Kefkius/clamcore,KainiIndustries/hullcore,pembo210/Litecore,KainiIndustries/hullcore,Kefkius/clamcore,phplaboratory/bitcore,jcvernaleo/bitcore,MonetaryUnit/bitcore,GroestlCoin/groestlcore,TOMOAKI12345/bitcore,litecoin-project/litecore,bitpay/bitcore,Bushstar/talentcore,adjoinant/bitcore,MulticoinExplorer/bitcore,sEpuLchEr/bitcore,habibmasuro/reddcore,iobond/bitcore,williamcotton/bitcore,janko33bd/bitcore,pnagurny/bitcore,casinocoin/csc-bitcore-v0.1,Bushstar/feathercore,lekkas/bitcore,bitpay/bitcore,TOMOAKI12345/bitcore,bankonme/bitcore,UdjinM6/darkcore,Bushstar/bollycore,Bushstar/feathercore,KainiIndustries/hullcore,casinocoin/csc-bitcore-v0.1,iobond/bitcore,KainiIndustries/hullcore,initaldk/bitcore,Bushstar/bollycore,bitjson/bitcore,UdjinM6/darkcore,martindale/bitcore,Kefkius/clamcore,bitpay/bitcore,Kefkius/clamcore,Bushstar/talentcore,Bushstar/bollycore,habibmasuro/reddcore,habibmasuro/reddcore,iobond/bitcore,habibmasuro/reddcore,MonetaryUnit/bitcore,casinocoin/csc-bitcore-v0.1,bankonme/bitcore,Bushstar/bollycore,initaldk/bitcore,eordano/bitcore,UdjinM6/darkcore,daxxog/clamcore,maraoz/coinforge,olalonde/bitcore,casinocoin/csc-bitcore-v0.1,williamcotton/bitcore,jcvernaleo/bitcore,eordano/bitcore,eXcomm/bitcore,UdjinM6/darkcore,MulticoinExplorer/bitcore,sEpuLchEr/bitcore,litecoin-project/litecore,KainiIndustries/hullcore,Bushstar/talentcore,martindale/bitcore,MulticoinExplorer/bitcore,habibmasuro/reddcore,bitjson/bitcore,pembo210/Litecore,bitjson/bitcore,braydonf/bitcore,KainiIndustries/hullcore,janko33bd/bitcore,bitpay/bitcore,MulticoinExplorer/bitcore,maraoz/coinforge,bitjson/bitcore,olalonde/bitcore,eXcomm/bitcore,phplaboratory/bitcore,Bushstar/feathercore,TeamPiggyCoin/PiggyCore,adjoinant/bitcore,casinocoin/csc-bitcore-v0.1,sEpuLchEr/bitcore,UdjinM6/darkcore,Bushstar/feathercore,bilthon/bitcore,MulticoinExplorer/bitcore