fix background.png for peercoin
fix background.png for peercoin

peercoin/peercoin,peercoin/peercoin,ppcoin/ppcoin,DigitalPandacoin/pandacoin,DigitalPandacoin/pandacoin,peercoin/peercoin,ppcoin/ppcoin,peercoin/peercoin,peercoin/peercoin,ppcoin/ppcoin,DigitalPandacoin/pandacoin,DigitalPandacoin/pandacoin,DigitalPandacoin/pandacoin,DigitalPandacoin/pandacoin,peercoin/peercoin,ppcoin/ppcoin