We should reject invalid extended keys per BIP-32 spec: Master keys (depth 0) must have zero parent fingerprint and child index. Found [here](https://github.com/bitcoinfuzz/bitcoinfuzz/pull/396#issuecomment-3785926218) through differential fuzzing using Bitcoinfuzz. Thanks @erickcestari for noticing it.
We should reject invalid extended keys per BIP-32 spec:
Master keys (depth 0) must have zero parent fingerprint and child index.
Found here through differential fuzzing using Bitcoinfuzz.
Thanks @erickcestari for noticing it.