merged 26787 from after the failed menu merge. "fix autofinder on device remove (nw)"

src/emu/device.c

@@ -814,6 +814,9 @@ void device_t::remove_subdevice(device_t &device)
 	for (device_t *scan = iter.first(); scan != NULL; scan = iter.next())
 		scan->m_device_map.reset(); //remove(&device);
 
+	// reset auto finder
+	m_auto_finder_list = NULL;
+
 	// remove from our list
 	m_subdevice_list.remove(device);
 }