MFC 1.106: Fix a number of cases where ugen would panic, especially when the device went away while open or if you tried to change the config number while devices were open.
MFC 1.106: Fix a number of cases where ugen would panic, especially
when the device went away while open or if you tried to change the
config number while devices were open.

Approved by:	re (hrs)

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