BugID: #06824

../../../../../src/devices/bus/ti99/gromport/gromport.cpp:283:15: runtime error: downcast of address 0x00003d295480 which does not point to an object of type 'bus::ti99::gromport::gromport_device'
0x00003d295480: note: object is of type 'empty_state'
 00 00 00 00  30 5b 5e 21 00 00 00 00  70 c2 72 3b 00 00 00 00  a0 54 29 3d 00 00 00 00  08 00 00 00
              ^~~~~~~~~~~~~~~~~~~~~~~
              vptr for 'empty_state'
../../../../../src/devices/bus/ti99/gromport/cartridges.cpp:393:16: runtime error: downcast of address 0x00003d295480 which does not point to an object of type 'bus::ti99::gromport::cartridge_connector_device'
0x00003d295480: note: object is of type 'empty_state'
 00 00 00 00  30 5b 5e 21 00 00 00 00  70 c2 72 3b 00 00 00 00  a0 54 29 3d 00 00 00 00  08 00 00 00
              ^~~~~~~~~~~~~~~~~~~~~~~
              vptr for 'empty_state'