ddc_write incorrect for values < 0x1ff

[jakealbert]

in ddc/ddc.c: ddc_write, the new value is set with:
data[5] = (_p_write).new_value;
data[4] = 0x1;
which is incorrect for values < 0x1ff. It should be:
data[4] = ((_p_write).new_value) >> 8;
data[5] = ((*p_write).new_value & 255);