fix invalid conversion error with MinGW 4.8.1 in net.cpp
fix invalid conversion error with MinGW 4.8.1 in net.cpp

- fixes src\net.cpp:1601: Error:invalid conversion from 'void*' to
  'const char*' [-fpermissive] in a setsockopt() call on Win32 that was
  found by using MinGW 4.8.1 compiler suite

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