[rmodels] Fix normal transform in UpdateModelAnimationBones
#4634
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As requested here: #4581 (comment)
I fixed the function by transforming the normals using only the rotational part of the transformation matrix, obtained via its inverse transpose.
I also simplified the inversion of the quaternion
inRotation
, which was being calculated twice within the same scope.Edit: the examples
models_animation
,models_bone_socket
, andmodels_loading_gltf
were successfully (re)tested.