Change value limit back to MAX_MONEY
Change value limit back to MAX_MONEY

The maximum amount in the helper function AmountFromValue was changed in
Bitcoin and merged into Peercoin, but Peercoin doesn't have the
21 millions limit.

peercoin/peercoin,peercoin/peercoin,DigitalPandacoin/pandacoin,glv2/peerunity,peercoin/peercoin,ppcoin/ppcoin,DigitalPandacoin/pandacoin,peercoin/peercoin,DigitalPandacoin/pandacoin,ppcoin/ppcoin,glv2/peerunity,glv2/peerunity,ppcoin/ppcoin,peercoin/peercoin,peercoin/peercoin,ppcoin/ppcoin,DigitalPandacoin/pandacoin,DigitalPandacoin/pandacoin,glv2/peerunity,DigitalPandacoin/pandacoin