One more fix for distributed build_sphere()
One more fix for distributed build_sphere()

I'm not sure whether this is triggered by the current PR or just by the
expanded testing we're using, but either way let's fix it.

roystgnr/libmesh,roystgnr/libmesh,dschwen/libmesh,jwpeterson/libmesh,dschwen/libmesh,libMesh/libmesh,dschwen/libmesh,BalticPinguin/libmesh,libMesh/libmesh,libMesh/libmesh,BalticPinguin/libmesh,dschwen/libmesh,dschwen/libmesh,jwpeterson/libmesh,jwpeterson/libmesh,dschwen/libmesh,libMesh/libmesh,roystgnr/libmesh,libMesh/libmesh,jwpeterson/libmesh,dschwen/libmesh,BalticPinguin/libmesh,libMesh/libmesh,BalticPinguin/libmesh,roystgnr/libmesh,BalticPinguin/libmesh,libMesh/libmesh,BalticPinguin/libmesh,roystgnr/libmesh,jwpeterson/libmesh,roystgnr/libmesh,BalticPinguin/libmesh,jwpeterson/libmesh,libMesh/libmesh,roystgnr/libmesh,jwpeterson/libmesh,jwpeterson/libmesh,dschwen/libmesh,roystgnr/libmesh,BalticPinguin/libmesh