[BUG] egg error when using argument D

[gooostaw]

Describe the bug
The egg function doesn't work if I use the D argument instead of R.

Code To Reproduce Bug

include <BOSL2/std.scad>
egg(78,d1=50,d2 = 25, D = 100);

Additional context
shapes2d.scad line 1475

D = get_radius(r1=R, d1=D)

should be changed to

R = get_radius(r1=R, d1=D)

am I right? ;)

[adrianVmariano]

You're sorta right. There's a second problem. I think it works in the PR.