Make barcode size assert trigger only in debug mode.
Make barcode size assert trigger only in debug mode.

- It's not a fatal error as the barcode might still work and isn't incorrect.
  The text string will work in any case.

jlaunonen/kirppu,jlaunonen/kirppu,mniemela/kirppu,jlaunonen/kirppu,mniemela/kirppu,mniemela/kirppu,jlaunonen/kirppu