1) ExifByte is now explicitly unsigned char: needed when dumping   unknown entries of the EXIF_FORMAT_BYTE type, such as XML Packet,   in exif_entry_get_value 2) Added ExifSByte as signed char.
1) ExifByte is now explicitly unsigned char: needed when dumping
  unknown entries of the EXIF_FORMAT_BYTE type, such as XML Packet,
  in exif_entry_get_value
2) Added ExifSByte as signed char.

libexif/libexif,libexif/libexif,libexif/libexif