Running this command:

   rpcclient -U root -c 'setdriver food2 food2' samba-food

Produces this output:

Succesfully set food2 to driver food2.

"Succesfully" is misspelt; it should read "Successfully". 

Line 1477 from cmd_spoolss.c:

        printf("Succesfully set %s to driver %s.\n", argv[1], argv[2]);