BUGFIX: Fix versionForNewListing logic around price modifiers.
BUGFIX: Fix versionForNewListing logic around price modifiers.

gubatron/openbazaar-go,hoffmabc/openbazaar-go,hoffmabc/openbazaar-go,OpenBazaar/openbazaar-go,OpenBazaar/openbazaar-go,OpenBazaar/openbazaar-go,gubatron/openbazaar-go,hoffmabc/openbazaar-go,gubatron/openbazaar-go