a4c91939e7
The versioning code for the new `Scale` input (a92b68939a)
always added new versioning nodes connected to the `Scale` input to ensure
that the node behaves as before.
But these versioning nodes are only necessary when a profile curve is connected.
Otherwise, they don't have any effect at all, since the node just outputs
a wire mesh in this case.
This skips adding the versioning nodes in case the profile socket
is unused. The default scale value will be 1.
Pull Request: https://projects.blender.org/blender/blender/pulls/138968