Issues with weapon preview images

[ReneeIbeji]

There seems to be issues with the preview images for some weapons, this seems to be because those items are only have sprite sheets for some custom animations which don't comply with the standards of the main character sprite sheet.
I'll propose a solution I am working on as a pull request.

[jrconway3]

Yeah that makes sense. A lot of weapon animations use "oversize" animations.