Adding this for collision minimap, but I'm sure it'd be useful for many other mods that deal with collision in this kind of way
exposes a function, obj_get_surface_from_index. pass in an object, and the index of the surface you want. numSurfaces is also added to know when to stop iterating through surfaces
Thanks to peachy for coming up with the better method of doing this
Co-authored-by: PeachyPeach <72323920+PeachyPeachSM64@users.noreply.github.com>
