This commit adds another optional check (when `--debug-io` is set) on write .blend process, to check and ensure all shape keys have their 'from' pointer properly set to their respective user ID. This is intended to be used as debuging tool mostly (to try to detect when/why some of those pointers can become NULL). For now, it also systematically perform same checks/fixes when loading a .blend file, to fix all broken ones laying around. Later we might move that usage to a do_version instead, but for now think it's safer to always perfom it (and it's rather cheap process anyway).
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1.4 KiB