If we run out of consumers while orphaning them, and the provider's geom is withering, destroy the provider when done.
If we run out of consumers while orphaning them, and the provider's geom
is withering, destroy the provider when done.

This was exposed by the recent change to geom_dev's orphaning logic.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase