(convert_number): If the denominator is zero, report an error instead of crashing.
(convert_number): If the denominator is zero, report an error instead
of crashing.

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