Philipp Oeser
5ba581bd0a
If a bone was specified (but now missing), the driver would fallback to using the object as a target (which can lead to unintended behavior). So now check if a bone is specified, if it is missing, mark the driver invalid. If no bone is specified at all, then use the armature object as the target. NOTE: `DTAR_FLAG_INVALID` is not granular enough to distinguish the object and bone targets, so both will be marked in red in the UI (there is already comments about it in code). If necessary, we could introduce an additional DTAR_FLAG_BONE_INVALID and use that in a couple of places. Pull Request: https://projects.blender.org/blender/blender/pulls/119533
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