tvm-input-device: Avoid criticals when ID_MODEL property is missing
The default mouse configured by virt-manager does not seem to have
model info (udevadm info /dev/input/mouse1
doesn't report any
model data).
Closes #25 (closed)
Testing
- I verified my mouse still works when changing the VM's resolution
- I verified there are no new memory leaks or memory errors with ASan
- I verified the criticals are no longer triggered