Incoming callback handles all events, should only be registered once

[ChrisDeadman]

pyPhone/pyphone/controllers/gammu_controller.py

Line 111 in 3ed2a94

self._gammu_worker.enqueue_command("SetIncomingCallback", (self._on_incoming_call,))

pyPhone/pyphone/controllers/gammu_controller.py

Line 114 in 3ed2a94

self._gammu_worker.enqueue_command("SetIncomingCallback", (self._on_incoming_sms,))

pyPhone/pyphone/controllers/gammu_controller.py

Line 117 in 3ed2a94

self._gammu_worker.enqueue_command("SetIncomingCallback", (self._on_incoming_ussd,))

I wonder how this even worked 🤣