* Translation updates: sr, vi, pl, uk, french
* fixed regression in exif_data_load_data which could not load EXIF in JPEG data anymore
* Decode lots of Canon tag names
* removed empty strings from translation (empty string would translate to the PO info header)
* various warning removals and code improvements
* added sample "persistent" afl fuzzer (100x faster than normal afl fuzzer)
OBS-URL: https://build.opensuse.org/package/show/graphics/libexif?expand=0&rev=43
