Allow automatic zero-page conversion for opcode columns 0C, 0D and 0E. That's not *quite* safe as e.g. JMP abs and JMP ind are there, but op_abs() isn't used for those so we don't mind.
Allow automatic zero-page conversion for opcode columns 0C, 0D and 0E. That's
not *quite* safe as e.g. JMP abs and JMP ind are there, but op_abs() isn't used
for those so we don't mind.

davidgiven/cowgol,davidgiven/cowgol