Kevin O'Connor 51e1085dbc gcode: Extend register_command() so that it can also unregister a command
If register_command() is passed None as the function to call, then
treat it as an unregister command request.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
2018-01-28 12:19:26 -05:00
..
2016-05-25 11:37:40 -04:00