Don't abort if the tile directory has the wrong size
This allows us to at least load the file referenced in BUG:379889 which is incomaptible with xcf version v0003, but still carries that version number. Now it loads in krita... But no guarantees about 2.9 files. Mostly, they will still crash krita because the xcftools library aborts hard on encountering a problem, which we cannot prevent.
Showing with 12 additions and 11 deletions