Fix memory leak on exception in Key::SignCompact
Fix memory leak on exception in Key::SignCompact

zestcoin/ZESTCOIN,therealaltcoin/altcoin,raasakh/bardcoin,gjhiggins/fuguecoin,peercoin/peercoin,borgcoin/Borgcoin.rar,totallylegitbiz/totallylegitcoin,Dinarcoin/dinarcoin,kevin-cantwell/crunchcoin,brettwittam/geocoin,BenjaminsCrypto/Benjamins-1,totallylegitbiz/totallylegitcoin,peercoin/peercoin,totallylegitbiz/totallylegitcoin,starwalkerz/fincoin-fork,therealaltcoin/altcoin,Earlz/dobbscoin-source,dobbscoin/dobbscoin-source,jimblasko/UnbreakableCoin-master,Earlz/dobbscoin-source,WorldLeadCurrency/WLC,hg5fm/nexuscoin,peercoin/peercoin,hg5fm/nexuscoin,gjhiggins/fuguecoin,keisercoin-official/keisercoin,brettwittam/geocoin,borgcoin/Borgcoin.rar,howardrya/AcademicCoin,webdesignll/coin,metrocoins/metrocoin,peercoin/peercoin,peacedevelop/peacecoin,zestcoin/ZESTCOIN,applecoin-official/fellatio,cryptohelper/premine,renatolage/wallets-BRCoin,peacedevelop/peacecoin,DigitalPandacoin/pandacoin,applecoin-official/fellatio,vbernabe/freicoin,Earlz/dobbscoin-source,goldmidas/goldmidas,pdrobek/Polcoin-1-3,peerdb/cors,CarpeDiemCoin/CarpeDiemLaunch,CarpeDiemCoin/CarpeDiemLaunch,madman5844/poundkoin,compasscoin/compasscoin,howardrya/AcademicCoin,SocialCryptoCoin/SocialCoin,barcoin-project/nothingcoin,howardrya/AcademicCoin,peerdb/cors,WorldLeadCurrency/WLC,vbernabe/freicoin,bitpagar/bitpagar,Adaryian/E-Currency,ionux/freicoin,Carrsy/PoundCoin,glv2/peerunity,Earlz/dobbscoin-source,peercoin/peercoin,metrocoins/metrocoin,keisercoin-official/keisercoin,Adaryian/E-Currency,ppcoin/ppcoin,peacedevelop/peacecoin,cryptocoins4all/zcoin,cryptohelper/premine,MitchellMintCoins/AutoCoin,applecoin-official/applecoin,tripmode/pxlcoin,WorldLeadCurrency/WLC,5mil/Tradecoin,tripmode/pxlcoin,raasakh/bardcoin.exe,barcoin-project/nothingcoin,glv2/peerunity,applecoin-official/applecoin,mammix2/ccoin-dev,gjhiggins/fuguecoin,5mil/Tradecoin,applecoin-official/fellatio,CarpeDiemCoin/CarpeDiemLaunch,osuyuushi/laughingmancoin,peerdb/cors,cryptocoins4all/zcoin,MitchellMintCoins/MortgageCoin,jimblasko/UnbreakableCoin-master,zestcoin/ZESTCOIN,brettwittam/geocoin,applecoin-official/applecoin,starwalkerz/fincoin-fork,barcoin-project/nothingcoin,Adaryian/E-Currency,MitchellMintCoins/AutoCoin,OfficialTitcoin/titcoin-wallet,raasakh/bardcoin.exe,cryptohelper/premine,vbernabe/freicoin,tripmode/pxlcoin,OfficialTitcoin/titcoin-wallet,pdrobek/Polcoin-1-3,hg5fm/nexuscoin,MitchellMintCoins/AutoCoin,hg5fm/nexuscoin,peerdb/cors,SocialCryptoCoin/SocialCoin,goldmidas/goldmidas,MitchellMintCoins/MortgageCoin,mammix2/ccoin-dev,dobbscoin/dobbscoin-source,jimblasko/2015_UNB_Wallets,vbernabe/freicoin,keisercoin-official/keisercoin,DigitalPandacoin/pandacoin,Enticed87/Decipher,ppcoin/ppcoin,totallylegitbiz/totallylegitcoin,brettwittam/geocoin,applecoin-official/fellatio,cryptocoins4all/zcoin,jimblasko/2015_UNB_Wallets,madman5844/poundkoin,Dinarcoin/dinarcoin,mammix2/ccoin-dev,ionux/freicoin,howardrya/AcademicCoin,raasakh/bardcoin.exe,peerdb/cors,totallylegitbiz/totallylegitcoin,tripmode/pxlcoin,starwalkerz/fincoin-fork,renatolage/wallets-BRCoin,Earlz/dobbscoin-source,qubitcoin-project/QubitCoinQ2C,jimblasko/2015_UNB_Wallets,cryptohelper/premine,raasakh/bardcoin.exe,Enticed87/Decipher,borgcoin/Borgcoin.rar,Carrsy/PoundCoin,cainca/liliucoin,webdesignll/coin,kevin-cantwell/crunchcoin,hg5fm/nexuscoin,MitchellMintCoins/AutoCoin,applecoin-official/applecoin,Enticed87/Decipher,Earlz/dobbscoin-source,Climbee/artcoin,compasscoin/compasscoin,zestcoin/ZESTCOIN,glv2/peerunity,tripmode/pxlcoin,borgcoin/Borgcoin1,cryptohelper/premine,raasakh/bardcoin,Carrsy/PoundCoin,ppcoin/ppcoin,qubitcoin-project/QubitCoinQ2C,therealaltcoin/altcoin,keisercoin-official/keisercoin,WorldLeadCurrency/WLC,kevin-cantwell/crunchcoin,CarpeDiemCoin/CarpeDiemLaunch,WorldLeadCurrency/WLC,borgcoin/Borgcoin1,glv2/peerunity,jimblasko/2015_UNB_Wallets,vbernabe/freicoin,osuyuushi/laughingmancoin,jimblasko/UnbreakableCoin-master,mammix2/ccoin-dev,Dinarcoin/dinarcoin,Adaryian/E-Currency,Climbee/artcoin,5mil/Tradecoin,OfficialTitcoin/titcoin-wallet,Enticed87/Decipher,CarpeDiemCoin/CarpeDiemLaunch,goldmidas/goldmidas,BenjaminsCrypto/Benjamins-1,metrocoins/metrocoin,Climbee/artcoin,MitchellMintCoins/MortgageCoin,goldmidas/goldmidas,ionux/freicoin,osuyuushi/laughingmancoin,raasakh/bardcoin.exe,5mil/Tradecoin,DigitalPandacoin/pandacoin,qubitcoin-project/QubitCoinQ2C,raasakh/bardcoin,5mil/Tradecoin,keisercoin-official/keisercoin,raasakh/bardcoin,MitchellMintCoins/AutoCoin,borgcoin/Borgcoin.rar,madman5844/poundkoin,compasscoin/compasscoin,Climbee/artcoin,SocialCryptoCoin/SocialCoin,mammix2/ccoin-dev,raasakh/bardcoin,madman5844/poundkoin,OfficialTitcoin/titcoin-wallet,barcoin-project/nothingcoin,cainca/liliucoin,osuyuushi/laughingmancoin,barcoin-project/nothingcoin,ppcoin/ppcoin,webdesignll/coin,peacedevelop/peacecoin,dobbscoin/dobbscoin-source,zestcoin/ZESTCOIN,bitpagar/bitpagar,raasakh/bardcoin,BenjaminsCrypto/Benjamins-1,compasscoin/compasscoin,qubitcoin-project/QubitCoinQ2C,jimblasko/2015_UNB_Wallets,kevin-cantwell/crunchcoin,Digita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