goaq

When drawing round_rect, the line width cannot be set to 1px ``` plutovg_save(pluto); plutovg_round_rect(pluto, 10, 10, 580, 50, 5, 5); plutovg_set_rgb(pluto, 0, 0, 1); plutovg_set_line_width(pluto, 1); plutovg_stroke_preserve(pluto); plutovg_stroke(pluto); plutovg_restore(pluto); ```...