fix: handle missing ieee_address

[git-developer]

Fix for #162 (comment)

[Ayush1325]

Yes, I think this should fix the regression. Seems the old parameter was initially assigned int 0 and then assigned string. While argparse should be None and string

[sultanqasim]

@JelmerT bringing this to your attention to fix #172

[LDprg]

Please merge this.

[git-developer]

Since a separate issue exists now: Fixes #172

[defanator]

Confirmed to work with ZBDongle-P which previously threw the exception.

[mtthidoteu]

Can also confirm fixes ERROR: int() can't convert non-string with explicit base error

[schmargi91]

I can also confirm that this error ist fixed with that PR.

Verifying by comparing CRC32 calculations. Verified (match: 0xe83aa727) ERROR: int() can't convert non-string with explicit base

[nicktimko]

Looks good to me, and confirmed to work when reflashing my Sonoff-P.

[damienleroux]

It solved my issue, thx a lot !!!!