Protect against PCI devices which may have their 'changed' flag set, or list items which may look like devices but which don't have an isa_device structure attached to them.
Protect against PCI devices which may have their 'changed' flag set,
or list items which may look like devices but which don't have an
isa_device structure attached to them.

This _shouldn't_ be possible, but it appears to have been
observed-by: Joerg

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