[BUG] Problem with auto-focus

[markbyrne]

Summary

Auto-focus is not working. There seems to be a key error for the setting "default"

self.opts[Focuser.OPT_FOCUS]["DEF_VALUE"] = ctrl['default']
openscan Node-RED[4233]: KeyError: 'default'

Screenshots/Video

Steps to reproduce
On launch, the camera attempts to auto-focus and fails due to key error.

[markbyrne]

Focuser get_ctrls(self.fd) returns the following:
[{'id': 10092545, 'type': 6, 'name': b'Camera Controls', 'minimum': 0, 'maximum': 0, 'step': 0, 'default_value': 0, 'flags': 68}, {'id': 10094858, 'type': 1, 'name': b'Focus, Absolute',>

Updating the following in Arducam.py seems to hav fixed the error:

try:
    self.opts[Focuser.OPT_FOCUS]["DEF_VALUE"] = ctrl['default']
except KeyError as e:
    self.opts[Focuser.OPT_FOCUS]["DEF_VALUE"] = ctrl['default_value']