Fix puzzle-diff for the exact matching
Fix puzzle-diff for the exact matching

E.g. The following command will return 20 as not similar.
puzzle-diff -e -E 0 pics/pic-a-0.jpg pics/pic-a-0.jpg
But 10 should be returned.

jedisct1/libpuzzle,maetbag/libpuzzle,estrabd/libpuzzle,jedisct1/libpuzzle,jedisct1/libpuzzle,estrabd/libpuzzle,estrabd/libpuzzle,maetbag/libpuzzle,maetbag/libpuzzle,jedisct1/libpuzzle