More updates to FixedBuffer to allow putting of zero EUI, AvdeccStrings
More updates to FixedBuffer to allow putting of zero EUI, AvdeccStrings

jdkoftinoff/jdksavdecc-mcu,jdkoftinoff/jdksavdecc-mcu,jdkoftinoff/jdksavdecc-mcu,jdkoftinoff/jdksavdecc-mcu