Canvas reaching outside of window

[JMatthysen]

Describe the bug
The lines drawn on a canvas inside a window are still visible outside of the bounds of the window.

To Reproduce
add_window("canvas_holding",width = 500, height = 500)

add_child("canvas_holder")

add_drawing("canvas", width= 500, height= 500)
draw_line("canvas", p1 = line1.p1, p2 = line1.p2,color = [150,150,150], thickness = 1)
draw_line("canvas", p1 = sensor1.origin, p2 = sensor1.p2, color =[100,200,150],thickness = 1)

end_child()
end_window()

Expected behavior
i expected only to see the lines that could be seen in the window.

Screenshots
see above

Additional context
Add any other context about the problem here.

[hoffstadt]

Fixed with lasted push.