39fdbded9a
The issue was that the versioning code didn't run when loading the action. Thus it had no slots and so was crashing trying to get the first slot. This PR fixes that in 2 ways: * Check the slot count of the loaded action, and return/notify the user * Actually make sure the actions are versioned Point 1 is important anyway because actions can have no slots (though unlikely). Point 2 ensures that old pose assets can actually be used Pull Request: https://projects.blender.org/blender/blender/pulls/135232
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