void draw_thick_line(drawing *dr, float thickness,
float x1, float y1, float x2, float y2, int colour)
{
+ if (thickness < 1.0)
+ thickness = 1.0;
if (dr->api->draw_thick_line) {
dr->api->draw_thick_line(dr->handle, thickness,
x1, y1, x2, y2, colour);