Don't try to load zero-length strings from IFDs.
treea7c4b98c0dda70be5824fae7223e2bb8133544df
-rw-r--r-- 1441 LICENSE.txt
-rw-r--r-- 203 README.txt
drwxr-xr-x - doc
-rw-r--r-- 35589 exif.lisp
-rw-r--r-- 1620 zpb-exif.asd