Whitewashed late StuG uses incorrect destroyed vehicle mesh for early StuG

[Matt Hands]

When the whitewashed late StuG (with conical mantlet & remote MG) is destroyed, it switches to the early StuG model, with boxy mantlet and smashed fixed MG.

We don't have a destroyed static mesh for this StuG variant.

[Matt Hands]

Fixed in commit 8a4fdc0.

It would be simple to add another static mesh, using the summer late StuG, re-skinned with whitewashed textures. But it isn't necessary, as we can simply re-skin the summer late StuG in code. I added generic functionality for this a while back. You just add any DestroyedMeshSkins to default properties.

This is a good example of how it works, without making & saving an extra static mesh. In future we could remove all camo variants of destroyed vehicles using this method.