This reverts commit rB3a48147b8ab92, and fixes the issues with linking etc. Change compared to previous buggy commit (rBf8d219dfd4c31) is that new `BlendFileReadReports` reports are now passed to the lowest level function generating the `FileData` (`filedata_new()`), which ensures (and asserts) that all code using it does have a valid non-NULL pointer to a `BlendFileReadReport` data. Sorry for the noise, it's always when you think a change is trivial and do not test it well enough that you end up doing those kind of mistakes...