MoveBustshot broken in Tsumi

We need to animate some CGs in Tsumi but it seems that MG managed to break MoveBustshot somehow. The code below works just fine in Hima but doesn't work in Tsumi.

```
DrawBustshot(4, "scene/014d", 0, -240, -135, FALSE, 0, 0, 0, 0, 0, 0, 0, 4, 200, FALSE );
MoveBustshot( 4, NULL, 0, 240, -135, 4, 3000, TRUE );
```

Here is the image (CONTAINS SPOILER FOR TSUMI):

https://user-images.githubusercontent.com/539462/42524325-73f64b70-8470-11e8-88fe-20190c0f0bb0.png

Look for the MoveBustshot function in the codebase, likely in a script or animation handling file. Compare its implementation between the Hima and Tsumi projects to identify the regression. Test the fix by running the provided code snippet in the Tsumi environment to verify the CG animates correctly.

Written by the indexing model from the issue text.