Some RNA structs, like operators or keymaps, are not allowed to have ID pointer properties. now this check will ignore those, and report an error message in the console. Related to T82597. Notes: While a bit more involved than rBf39fbb3e6046, this commit remains fairly localized and non-intrusive. It relies on some rather obscure and weird behaviors of our RNA code though, a cleaner solution could be e.g. to add a tye to `StructOrFunctionRNA`, so that we could properly 'rebuild' (re-cast) the pointer to either `StructRNA` or `FunctionRNA` when needed in internal code...