Mistake in 4d7274b7f4.
The Previous code:
```
float(*deformedVerts)[3] = *deformcos;
float(*origVerts)[3] = static_cast<float(*)[3]>(MEM_dupallocN(deformedVerts));
```
Didn't create a copy of the positions for the `deformedVerts` variable.
It's meant to modify the input position array. It was probably done that way
since dealing with pointers to pointers in C was annoying. With `Array`,
it's not annoying anymore, we can just use that directly.
84b6c30317