[snapshot] fix ino/dev order

Author: tamland

src/watchdog/utils/dirsnapshot.py

@@ -205,7 +205,7 @@ def __init__(self, path, recursive=True,
 
         st = stat(path)
         self._stat_info[path] = st
-        self._inode_to_path[(st.st_dev, st.st_ino)] = path
+        self._inode_to_path[(st.st_ino, st.st_dev)] = path
 
         def walk(root):
             paths = [os.path.join(root, name) for name in listdir(root)]