High V_Scale values don't render as expected

[Yazwh0]

With a high V_Scale value we get what appears to be line 480 copied down the screen. This feels unintuitive. It should either be line 479 (where line 0 is the first line), draw nothing, or should continue to render without the 480 constraint.

So either change this to 479, or remove the check?
https://github.com/fvdhoef/vera-module/blob/rev4/fpga/source/graphics/composer.v#L157

Test app for above:
code: test.zip
prg: example.zip

[Yazwh0]

scaled_y_counter isn't wide enough to hold the max scaled value of 956. (0xff * 480 >> 7) If that cannot be widened I guess second most preferable result would be that it would work like high H_Scale values where it renders colour 0?