Campfire should use unaltered item model for non-block items

[Exsolutus]

The way the campfire scales the models/textures for fuels works well for blocks as fuel. However, non-block item models can look strange because of this. Example attached.

Non-block items should not receive the model scaling when used in the campfire, and instead use the existing item model.

[codetaylor]

Yeah, this is currently a limitation of the interaction framework that was developed for the mod.