[V21 stable steam] chemlights sprite missing (minor issue)

[thixotrop]

As discussed here:

The chemlight thrown by my sniper with buzzard armor from the top of a house did not land on the ground.

I don't know if I selected the ground level to target, but it seems the chemlight landed on first level, though the illumination is correct.

The illuminated area (see white circle) seen by a soldier from the ground, no chemlight displayed.

When switching to first level, the chemlight is displayed laying on the ground (see chemlight now ion white circle).