bignum.h: shut up msvc warnings
bignum.h: shut up msvc warnings

penek/novacoin,elambert2014/novacoin,novacoin-project/novacoin,stamhe/novacoin,penek/novacoin,fsb4000/novacoin,byncoin-project/byncoin,byncoin-project/byncoin,elambert2014/novacoin,stamhe/novacoin,penek/novacoin,fsb4000/novacoin,fsb4000/novacoin,fsb4000/novacoin,penek/novacoin,fsb4000/novacoin,novacoin-project/novacoin,novacoin-project/novacoin,byncoin-project/byncoin,byncoin-project/byncoin,novacoin-project/novacoin,elambert2014/novacoin,stamhe/novacoin,byncoin-project/byncoin,novacoin-project/novacoin,stamhe/novacoin,elambert2014/novacoin,penek/novacoin,elambert2014/novacoin,elambert2014/novacoin,fsb4000/novacoin,byncoin-project/byncoin,penek/novacoin,stamhe/novacoin,novacoin-project/novacoin