Check earlier for blocks with duplicate transactions. Fixes #1167
Check earlier for blocks with duplicate transactions. Fixes #1167

ALEXIUMCOIN/alexium,redfish64/nomiccoin,benzhi888/renminbi,jashandeep-sohi/ppcoin,lordsajan/erupee,NeuCoin/neucoin,FuzzyBearBTC/Peershares2,bitgrowchain/bitgrow,neureal/noocoin,yacoin/yacoin,Rimbit/Wallets,etercoin/etercoin,FuzzyBearBTC/peercoin,TheSeven/ppcoin,peercoin/peercoin,TheoremCrypto/TheoremCoin,FuzzyBearBTC/peercoin,elambert2014/cbx2,peerdb/cors,MoMoneyMonetarism/ppcoin,5mil/SuperTurboStake,redfish64/nomiccoin,CoinGame/BCEShadowNet,sproutcoin/sprouts,lentza/SuperTurboStake,gfneto/Peershares,BeirdoMud/MudCoin,internaut-me/ppcoin,novacoin-project/novacoin,Crypto-Currency/BitBar,elambert2014/cbx2,pinkmagicdev/SwagBucks,LanaCoin/lanacoin,jashandeep-sohi/ppcoin,AquariusNetwork/ARCOv2,CoinGame/BCEShadow,snakie/ppcoin,dooglus/clams,Whitecoin-org/Whitecoin,valorbit/valorbit-oss,CoinBlack/blackcoin,fsb4000/novacoin,redfish64/nomiccoin,elambert2014/cbx2,coinkeeper/2015-06-22_18-45_peercoin,robvanmieghem/clams,gfneto/Peershares,FuzzyBearBTC/Peershares,dooglus/clams,Stakemaker/OMFGcoin,vizidrixfork/Peershares,Whitecoin-org/Whitecoin,dopecoin-dev/DopeCoinGold,Peerapps/ppcoin,blackcoinhelp/blackcoin,bitgrowchain/bitgrow,lentza/SuperTurboStake,vizidrixfork/Peershares,fsb4000/novacoin,elcrypto/Pulse,BlueMeanie/PeerShares,slimcoin-project/Slimcoin,CoinGame/NuShadowNet,Someguy123/novafoil,peercoin/peercoin,elambert2014/cbx2,Peerapps/ppcoin,ghostlander/Orbitcoin,Rimbit/Wallets,peercoin/peercoin,BlueMeanie/PeerShares,greencoin-dev/GreenCoinV2,sproutcoin/sprouts,coinkeeper/2015-06-22_18-45_peercoin,sigmike/peercoin,CoinGame/BCEShadowNet,robvanmieghem/clams,Jheguy2/Mercury,IOCoin/DIONS,daeMOn63/Peershares,CoinBlack/bitcoin,yacoin/yacoin,FuzzyBearBTC/Peershares-1,coinkeeper/2015-06-22_18-45_peercoin,penek/novacoin,FuzzyBearBTC/Peershares2,AquariusNetwork/ARCO,jyap808/jumbucks,Action-Committee/Spaceballz,d5000/ppcoin,AquariusNetwork/ARCO,peercoin/peercoin,valorbit/valorbit,Whitecoin-org/Whitecoin,palm12341/jnc,Ziftr/ppcoin,CoinBlack/bitcoin,novacoin-project/novacoin,snakie/ppcoin,ya4-old-c-coder/yacoin,Kefkius/clams,CoinGame/BCEShadowNet,5mil/SuperTurboStake,MOIN/moin,dopecoin-dev/DopeCoinGold,benzhi888/renminbi,CoinGame/NuShadowNet,gades/novacoin,BeirdoMud/MudCoin,lateminer/DopeCoinGold,d5000/ppcoin,elcrypto/Pulse,dopecoin-dev/DopeCoinGold,shadowproject/shadow,TheSeven/ppcoin,ALEXIUMCOIN/alexium,xranby/blackcoin,FuzzyBearBTC/Peershares2,xranby/blackcoin,ghostlander/Orbitcoin,fsb4000/novacoin,FuzzyBearBTC/Peerunity,internaut-me/ppcoin,palm12341/jnc,GeopaymeEE/e-goldcoin,FuzzyBearBTC/Peerunity,IOCoin/DIONS,NeuCoin/neucoin,gades/novacoin,daeMOn63/Peershares,Jheguy2/Mercury,lentza/SuperTurboStake,shadowproject/shadow,Magicking/neucoin,lentza/SuperTurboStake,iadix/iadixcoin,TheoremCrypto/TheoremCoin,lateminer/DopeCoinGold,elambert2014/novacoin,FuzzyBearBTC/Peershares,MoMoneyMonetarism/ppcoin,pinkmagicdev/SwagBucks,robvanmieghem/clams,glv2/peerunity,iceinsidefire/peershare-edit,neureal/noocoin,ALEXIUMCOIN/alexium,lateminer/DopeCoinGold,VsyncCrypto/Vsync,byncoin-project/byncoin,CoinGame/BCEShadowNet,SproutsEx/SproutsExtreme,IOCoin/DIONS,iadix/iadixcoin,SproutsEx/SproutsExtreme,FuzzyBearBTC/Peershares,elcrypto/Pulse,iceinsidefire/peershare-edit,d5000/ppcoin,landcoin-ldc/landcoin,BlueMeanie/PeerShares,okcashpro/okcash,bitgrowchain/bitgrow,peerdb/cors,gorgoy/novacoin,5mil/Bolt,FuzzyBearBTC/Fuzzyshares,penek/novacoin,daeMOn63/Peershares,CoinGame/BCEShadow,effectsToCause/vericoin,vizidrixfork/Peershares,blackcoinhelp/blackcoin,Peerunity/Peerunity,valorbit/valorbit,lordsajan/erupee,phorensic/yacoin,byncoin-project/byncoin,GeopaymeEE/e-goldcoin,gfneto/Peershares,dooglus/clams,lordsajan/erupee,LanaCoin/lanacoin,CoinBlack/blackcoin,FuzzyBearBTC/Fuzzyshares,penek/novacoin,greencoin-dev/GreenCoinV2,CoinGame/NuShadowNet,slimcoin-project/Slimcoin,Peershares/Peershares,Jheguy2/Mercury,thodg/ppcoin,VsyncCrypto/Vsync,vectorcoindev/Vector,jyap808/jumbucks,stamhe/novacoin,etercoin/etercoin,ppcoin/ppcoin,IOCoin/DIONS,jlay11/sharecoin,lordsajan/erupee,novacoin-project/novacoin,effectsToCause/vericoin,valorbit/valorbit,Whitecoin-org/Whitecoin,elambert2014/novacoin,Crypto-Currency/BitBar,VsyncCrypto/Vsync,pocopoco/yacoin,Rimbit/Wallets,FuzzyBearBTC/Peerunity,stronghands/stronghands,Peerunity/Peerunity,AquariusNetwork/ARCOv2,xranby/blackcoin,FuzzyBearBTC/Peershares-1,gorgoy/novacoin,phorensic/yacoin,Ziftr/ppcoin,coinkeeper/2015-06-22_18-45_peercoin,CoinBlack/bitcoin,elambert2014/cbx2,gades/novacoin,peerdb/cors,jlay11/sharecoin,FuzzyBearBTC/Fuzzyshares,yacoin/yacoin,prodigal-son/blackcoin,Peerapps/ppcoin,stamhe/novacoin,CoinGame/NuShadowNet,stronghands/stronghands,blackcoinhelp/blackcoin,internaut-me/ppcoin,CoinBlack/bitcoin,stamhe/novacoin,5mil/SuperTurboStake,DigitalPandacoin/pandacoin,phorensic/yacoin,gades/novacoin,Someguy123/novafoil,som4paul/BolieC,jashandeep-sohi/ppcoin,CoinGame/NuShadowNet,snakie/ppcoin,rat4/blackcoin,glv2/peerunity,TurboStake/TurboStake,bitgrowchain/bitgrow,SproutsEx/SproutsExtreme,MoMoneyMonetarism/ppcoin,ya4-old-c-coder/yacoin,Crypto-Currency/BitBar,sigmike/peercoin,Someguy123/novafoil,FuzzyBearBTC/Peershares2,Jheguy2/Mercury,gorgoy/novacoin,Someguy123/novafoil,ForceMajeure/BitPenny-Client,ya4-old-c-coder/yacoin,elambert2014/novacoin,TurboStake/TurboStake,shadowproject/shadow,stamhe/ppcoin,CoinGame/BCEShadowNet,ghostlander/Orbitcoin,DigitalPandacoin/pandacoin,stamhe/novacoin,IOCoin/iocoin,thodg/ppcoin,prodigal-son/blackcoin,benzhi888/renminbi,greencoin-dev/GreenCoinV2,gades/novacoin,IOCoin/DIONS,stronghands/stronghands,FuzzyBearBTC/Peershares,GeopaymeEE/e-goldcoin,effectsToCause/vericoin,GeopaymeEE/e-goldcoin,ForceMajeure/BitPenny-Client,CoinBlack/blackcoin,landcoin-ldc/landcoin,iadix/iadixcoin,FuzzyBearBTC/Peerunity,iadix/iadixcoin,slimcoin-project/Slimcoin,senadj/yacoin,phorensic/yacoin,FuzzyBearBTC/Fuzzyshares,VsyncCrypto/Vsync,Stakemaker/OMFGcoin,ghostlander/Orbitcoin,MOIN/moin,ALEXIUMCOIN/alexium,nochowderforyou/clams,yacoin/yacoin,NeuCoin/neucoin,Magicking/neucoin,glv2/peerunity,daeMOn63/Peershares,ghostlander/Testcoin,d5000/ppcoin,jlay11/sharecoin,vectorcoindev/Vector,redfish64/nomiccoin,dooglus/clams,Peershares/Peershares,IOCoin/iocoin,prodigal-son/blackcoin,fsb4000/novacoin,AquariusNetwork/ARCOv2,iadix/iadixcoin,Kefkius/clams,iadix/iadixcoin,penek/novacoin,FuzzyBearBTC/Peershares-1,daeMOn63/Peershares,elambert2014/novacoin,nochowderforyou/clams,novacoin-project/novacoin,Kefkius/clams,thunderrabbit/clams,elcrypto/Pulse,Ziftr/ppcoin,ALEXIUMCOIN/alexium,IOCoin/DIONS,ghostlander/Testcoin,pinkmagicdev/SwagBucks,shadowproject/shadow,BlueMeanie/PeerShares,vectorcoindev/Vector,jyap808/jumbucks,sigmike/peercoin,novacoin-project/novacoin,lateminer/DopeCoinGold,Action-Committee/Spaceballz,valorbit/valorbit-oss,FuzzyBearBTC/Peershares-1,dooglus/clams,penek/novacoin,byncoin-project/byncoin,AquariusNetwork/ARCO,CoinBlack/bitcoin,jlay11/sharecoin,VsyncCrypto/Vsync,Action-Committee/Spaceballz,glv2/peerunity,som4paul/BolieC,AquariusNetwork/ARCOv2,elambert2014/novacoin,senadj/yacoin,peerdb/cors,CoinGame/BCEShadow,sproutcoin/sprouts,AquariusNetwork/ARCOv2,FuzzyBearBTC/Peershares,CoinBlack/blackcoin,ppcoin/ppcoin,okcashpro/okcash,Rimbit/Wallets,yacoin/yacoin,Jheguy2/Mercury,Crypto-Currency/BitBar,FuzzyBearBTC/peercoin,sigmike/peercoin,Ziftr/Peerunity,AquariusNetwork/ARCO,jashandeep-sohi/ppcoin,5mil/SuperTurboStake,TheoremCrypto/TheoremCoin,jyap808/jumbucks,lordsajan/erupee,Action-Committee/Spaceballz,ghostlander/Testcoin,peerdb/cors,gades/novacoin,senadj/yacoin,DigitalPandacoin/pandacoin,snakie/ppcoin,slimcoin-project/Slimcoin,Peerunity/Peerunity,IOCoin/DIONS,FuzzyBearBTC/peercoin,BeirdoMud/MudCoin,ghostlander/Orbitcoin,internaut-me/ppcoin,TurboStake/TurboStake,peercoin/peercoin,DigitalPandacoin/pandacoin,peercoin/peercoin,thunderrabbit/clams,lateminer/DopeCoinGold,FuzzyBearBTC/Peershares2,neureal/noocoin,nochowderforyou/clams,iadix/iadixcoin,lentza/SuperTurboStake,5mil/Bolt,MOIN/moin,prodigal-son/blackcoin,gfneto/Peershares,nochowderforyou/clams,benzhi888/renminbi,robvanmieghem/clams,ForceMajeure/BitPenny-Client,Ziftr/ppcoin,vectorcoindev/Vector,MOIN/moin,rat4/blackcoin,thunderrabbit/clams,pinkmagicdev/SwagBucks,valorbit/valorbit-oss,LanaCoin/lanacoin,pocopoco/yacoin,CoinGame/BCEShadow,vizidrixfork/Peershares,byncoin-project/byncoin,Peerunity/Peerunity,dopecoin-dev/DopeCoinGold,CoinBlack/bitcoin,valorbit/valorbit-oss,okcashpro/okcash,pocopoco/yacoin,SproutsEx/SproutsExtreme,rat4/blackcoin,som4paul/BolieC,Stakemaker/OMFGcoin,iadix/iadixcoin,landcoin-ldc/landcoin,thodg/ppcoin,TheSeven/ppcoin,Ziftr/Peerunity,TheSeven/ppcoin,slimcoin-project/Slimcoin,MOIN/moin,MoMoneyMonetarism/ppcoin,palm12341/jnc,TheoremCrypto/TheoremCoin,palm12341/jnc,shadowproject/shadow,Peershares/Peershares,okcashpro/okcash,sigmike/peercoin,LanaCoin/lanacoin,senadj/yacoin,rat4/blackcoin,thodg/ppcoin,iadix/iadixcoin,gorgoy/novacoin,ppcoin/ppcoin,gorgoy/novacoin,robvanmieghem/clams,okcashpro/okcash,ForceMajeure/BitPenny-Client,som4paul/BolieC,Ziftr/Peerunity,palm12341/jnc,lordsajan/erupee,Kefkius/clams,okcashpro/okcash,Stakemaker/OMFGcoin,thunderrabbit/clams,IOCoin/iocoin,5mil/Bolt,IOCoin/DIONS,stamhe/ppcoin,stamhe/novacoin,DigitalPandacoin/pandacoin,CoinBlack/blackcoin,thodg/ppcoin,valorbit/valorbit,benzhi888/renminbi,valorbit/valorbit-oss,ya4-old-c-coder/yacoin,slimcoin-project/Slimcoin,valorbit/valorbit,dopecoin-dev/DopeCoinGold,ghostlander/Testcoin,fsb4000/novacoin,blackcoinhelp/blackcoin,TheoremCrypto/TheoremCoin,Magicking/neucoin,stronghands/stronghands,redfish64/nomiccoin,Magicking/neucoin,prodigal-son/blackcoin,Ziftr/Peerunity,jlay11/sharecoin,NeuCoin/neucoin,jyap808/jumbucks,iadix/iadixcoin,DigitalPandacoin/pandacoin,MoMoneyMonetarism/ppcoin,phorensic/yacoin,Peershares/Peershares,TurboStake/TurboStake,TheSeven/ppcoin,LanaCoin/lanacoin,FuzzyBearBTC/Peershares-1,GeopaymeEE/e-goldcoin,BlueMeanie/PeerShares,byncoin-project/byncoin,som4paul/BolieC,thunderrabbit/clams,elambert2014/novacoin,senadj/yacoin,landcoin-ldc/landcoin,MOIN/moin,rat4/blackcoin,penek/novacoin,greencoin-dev/GreenCoinV2,stamhe/ppcoin,Ziftr/ppcoin,Kefkius/clams,BeirdoMud/MudCoin,nochowderforyou/clams,novacoin-project/novacoin,ya4-old-c-coder/yacoin,iceinsidefire/peershare-edit,AquariusNetwork/ARCO,jlay11/sharecoin,fsb4000/novacoin,pocopoco/yacoin,etercoin/etercoin,Peerapps/ppcoin,effectsToCause/vericoin,IOCoin/iocoin,redfish64/nomiccoin,iceinsidefire/peershare-edit,Rimbit/Wallets,vectorcoindev/Vector,etercoin/etercoin,ppcoin/ppcoin,lordsajan/erupee,neureal/noocoin,lordsajan/erupee,landcoin-ldc/landcoin,pinkmagicdev/SwagBucks,Whitecoin-org/Whitecoin,shadowproject/shadow,5mil/Bolt,etercoin/etercoin,greencoin-dev/GreenCoinV2,stamhe/ppcoin,effectsToCause/vericoin,CoinGame/BCEShadow,xranby/blackcoin,blackcoinhelp/blackcoin,iadix/iadixcoin,sproutcoin/sprouts,pocopoco/yacoin,peerdb/cors,IOCoin/iocoin,byncoin-project/byncoin