EventCodeIterator doesn't handle all keys

[LunNova]

EventCodeIterator skips some event codes. One example of this is the Thrustmaster Solaris Base, which has EV_KEY 300, 301, and 302 as keys.

evtest output:

Input driver version is 1.0.1
Input device ID: bus 0x3 vendor 0x44f product 0x422 version 0x111
Input device name: "Thrustmaster Solaris Base"
Supported events:
  Event type 0 (EV_SYN)
  Event type 1 (EV_KEY)
... (snipped)
    Event code 298 (BTN_BASE5)
    Event code 299 (BTN_BASE6)
    Event code 300 (?)
    Event code 301 (?)
    Event code 302 (?)
    Event code 303 (BTN_DEAD)
    Event code 704 (BTN_TRIGGER_HAPPY1)
    Event code 705 (BTN_TRIGGER_HAPPY2)
... (snipped)

It's not possible to use EventCodeIterator to find these supported codes, which are mapped to real physical buttons.

If I try to store the supported event codes in a file to later create a virtual device to replay inputs I will inadvertently created a different device with missing event codes.

This is caused by int_to_ev_key returning None for unknown codes. It's possible to ignore the iterator and manually scan for these codes by constructing an EV_UNK that has type = 1 and code = 300 and passing that to has_event_code.