Possible micro-optimisation in screen.asm

[ZornsLemma]

There are two copies of the following code sequence in screen.asm:

    jsr z_get_low_global_variable_value
    stx z_operand_value_low_arr
    sta z_operand_value_high_arr
    jsr z_ins_print_num

By moving the first three instructions to immediately before z_ins_print_num (so they can fall through into it), seven bytes can be saved. If the sequence is labelled something like "print_low_global_variable_value" I don't think this even harms readability.

[fredrikr]

Good idea, thanks. Done.