Fix rest update process by dirty flag to not take into account pose dirty flag in Skeleton3D

[TokageItLab]

There is a problem where the flags have the wrong priority and when rest is changed, rest is not updated if there is no change in the pose, fixed.

[TokageItLab]

Suggested change

	if (rest_dirty) {
	int current_bone_idx = nested_set_offset_to_bone_index[offset];
	Bone &b = bonesptr[current_bone_idx];
	b.global_rest = b.parent >= 0 ? bonesptr[b.parent].global_rest * b.rest : b.rest; // Rest needs update apert from pose.
	}
	int current_bone_idx = nested_set_offset_to_bone_index[offset];
	Bone &b = bonesptr[current_bone_idx];
	bool bone_enabled = b.enabled && !show_rest_only;
	if (rest_dirty) {
	b.global_rest = b.parent >= 0 ? bonesptr[b.parent].global_rest * b.rest : b.rest; // Rest needs update apert from pose.
	}

current_bone_idx and &b are defined again immediately below.

I think we wanted to skip access to the arrays for improved performance if there is no pose change, so I put them inside the if block to account for the frequency of rest dirty (since it should be few), but the code would look cleaner if we put them outside. Which would be better?

[fire]

so I put them inside the if block to account for the frequency of rest dirty (since it should be few)

I wonder if we can see the performance on a graph.

[SaracenOne]

Approved in meeting 👍

[Repiteo]

Thanks!