Fixes#14242.
In the current dev fusing an empty shape with a face or solid no longer works (probably introduced with #14169). The reason for starting with an empty shape was the assumption that the end result would then always have a default placement. But that is only correct if multiple objects are fused.
In the new version of the code fusing no longer starts with an empty shape. The default placement issue is solved by always returning a compound.
Additionally the value for the Area property is now taken after offsetting and fusing the faces.
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