Optimized several "in_place" function in balance_t
Optimized several "in_place" function in balance_t

afh/ledger,jwakely/ledger,duncanmortimer/ledger,ledger/ledger,jwakely/ledger,paulbdavis/ledger,afh/ledger,ledger/ledger,jwakely/ledger,jwakely/ledger,afh/ledger,ledger/ledger,paulbdavis/ledger,paulbdavis/ledger,ledger/ledger,duncanmortimer/ledger,duncanmortimer/ledger,duncanmortimer/ledger,jwakely/ledger,duncanmortimer/ledger,jwakely/ledger,duncanmortimer/ledger,duncanmortimer/ledger,afh/ledger,ledger/ledger,jwakely/ledger,afh/ledger,paulbdavis/ledger,paulbdavis/ledger,paulbdavis/ledger,paulbdavis/ledger