Fix regression when adding feature without geom #46687

[Gustry]

On master, it wasn't possible to add new feature on a geometry less table, from the toolbar.

@3nids It seems a regression from your PR #46687

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[Gustry]

It's not stale, waiting for a review.
Still the error on master

[lbartoletti]

@Gustry seems ok to me. Maybe, it's worth a test?

[3nids]

sorry for the delay!