qt: Check wallet model to prevent segfault

AvianNetwork / Avian

Avian Network is a proof-of-work secured blockchain designed for efficient and interoperable asset management.

https://avn.network

MIT License

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Closed alamshafil closed 2 years ago

alamshafil commented 2 years ago

This PR fixes a potential segfault when attempting to get user info from a nullptr wallet model.